From fcbcabfb7d3484314c02b112edde1cfc9a9f3a6f Mon Sep 17 00:00:00 2001 From: chenjunjie Date: Mon, 20 Apr 2026 14:27:46 +0000 Subject: [PATCH] DCS UMN 20251222 version Reviewed-by: Liudmila Denisova Co-authored-by: chenjunjie Co-committed-by: chenjunjie --- docs/dcs/umn/ALL_META.TXT.json | 518 ++--- docs/dcs/umn/CLASS.TXT.json | 693 +++---- docs/dcs/umn/CacheMasterSlave.html | 2 +- docs/dcs/umn/CacheProxy.html | 2 +- docs/dcs/umn/CacheSingleNode.html | 16 +- docs/dcs/umn/PurchasePreparation.html | 6 +- docs/dcs/umn/RedisDifference.html | 6 +- docs/dcs/umn/TagManagement.html | 2 +- docs/dcs/umn/dcs-faq-020220331.html | 17 + docs/dcs/umn/dcs-faq-0326021.html | 6 +- docs/dcs/umn/dcs-faq-0326022.html | 2 +- docs/dcs/umn/dcs-faq-0427028.html | 14 + docs/dcs/umn/dcs-faq-0427070.html | 2 +- docs/dcs/umn/dcs-faq-0603001.html | 6 +- docs/dcs/umn/dcs-faq-0730006.html | 1 + docs/dcs/umn/dcs-faq-0730007.html | 2 +- docs/dcs/umn/dcs-faq-0730012.html | 1 + docs/dcs/umn/dcs-faq-0730019.html | 12 - 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docs/dcs/umn/{en-us_image_0000001187846598.png => en-us_image_0000002278891732.png} (100%) create mode 100644 docs/dcs/umn/en-us_image_0000002289570913.png rename docs/dcs/umn/{en-us_image_0000001233126245.png => en-us_image_0000002313491413.png} (100%) rename docs/dcs/umn/{en-us_image_0000001188005622.png => en-us_image_0000002313524429.png} (100%) create mode 100644 docs/dcs/umn/en-us_image_0000002416373129.png create mode 100644 docs/dcs/umn/en-us_image_0000002477620454.png create mode 100644 docs/dcs/umn/en-us_image_0000002477627670.png delete mode 100644 docs/dcs/umn/en-us_image_0148195246.png delete mode 100644 docs/dcs/umn/en-us_image_0296784660.png diff --git a/docs/dcs/umn/ALL_META.TXT.json b/docs/dcs/umn/ALL_META.TXT.json index bf8073b77..a1ba8dcd6 100644 --- a/docs/dcs/umn/ALL_META.TXT.json +++ b/docs/dcs/umn/ALL_META.TXT.json @@ -91,7 +91,7 @@ "node_id":"cachesinglenode.xml", "product_code":"dcs", "code":"5", - "des":"A single-node DCS Redis instance has only one node and does not support data persistence. They are suitable for cache services that do not require data reliability.You ca", + "des":"A single-node DCS Redis instance has only one node and does not support data persistence. They are suitable for cache services that do not require data reliability.The ma", "doc_type":"usermanual", "kw":"Single-Node Redis,DCS Instance Types,User Guide", "search_title":"", @@ -112,7 +112,7 @@ "node_id":"cachemasterslave.xml", "product_code":"dcs", "code":"6", - "des":"This section describes master/standby DCS Redis instances.You cannot upgrade the Redis version for an instance. For example, a master/standby DCS Redis 4.0 instance canno", + "des":"This section describes master/standby DCS Redis instances.The major version cannot be upgraded. For example, a master/standby DCS Redis 4.0 instance cannot be upgraded to", "doc_type":"usermanual", "kw":"Master/Standby Redis,DCS Instance Types,User Guide", "search_title":"", @@ -413,9 +413,10 @@ "metedata":[ { "prodname":"dcs", + "opensource":"true", "documenttype":"usermanual", "IsMulti":"Yes", - "opensource":"true" + "IsBot":"Yes" } ], "title":"Commands Supported and Disabled by DCS for Redis 7.0", @@ -1287,7 +1288,7 @@ "node_id":"dcs-ug-0326014.xml", "product_code":"dcs", "code":"62", - "des":"On the DCS console, you can delete one or multiple DCS instances at a time. You can also delete all instance creation tasks that have failed to run.After a DCS instance i", + "des":"On the DCS console, you can delete one or multiple DCS instances at a time. You can also delete all instance creation tasks that have failed to run.DCS instances already ", "doc_type":"usermanual", "kw":"delete one or multiple DCS instances,Deleting DCS Instances,Operating DCS Instances,User Guide", "search_title":"", @@ -1310,7 +1311,7 @@ "code":"63", "des":"On the DCS console, you can manually switch the master and standby nodes of a DCS instance. This operation is used for special purposes, for example, releasing all servic", "doc_type":"usermanual", - "kw":"Performing a Master/Standby Switchover for a DCS Instance,Operating DCS Instances,User Guide", + "kw":"during the switchover,Performing a Master/Standby Switchover for a DCS Instance,Operating DCS Instan", "search_title":"", "metedata":[ { @@ -1387,11 +1388,32 @@ "title":"Command Renaming", "githuburl":"" }, + { + "uri":"dcs_03_0016.html", + "node_id":"dcs_03_0016.xml", + "product_code":"dcs", + "code":"67", + "des":"DCS optimizes functions and fixes vulnerabilities in minor and proxy upgrades. This section describes how to upgrade the minor or proxy version of an instance.Upgrading t", + "doc_type":"usermanual", + "kw":"Upgrading the Minor or Proxy Version of a DCS Instance,Operating DCS Instances,User Guide", + "search_title":"", + "metedata":[ + { + "prodname":"dcs", + "opensource":"true", + "documenttype":"usermanual", + "IsMulti":"Yes", + "IsBot":"Yes" + } + ], + "title":"Upgrading the Minor or Proxy Version of a DCS Instance", + "githuburl":"" + }, { "uri":"dcs-ug-0312022.html", "node_id":"dcs-ug-0312022.xml", "product_code":"dcs", - "code":"67", + "code":"68", "des":"HUAWEI CLOUD Help Center presents technical documents to help you quickly get started with HUAWEI CLOUD services. The technical documents include Service Overview, Price Details, Purchase Guide, User Guide, API Reference, Best Practices, FAQs, and Videos.", "doc_type":"usermanual", "kw":"Managing DCS Instances", @@ -1412,7 +1434,7 @@ "uri":"dcs-ug-0312023.html", "node_id":"dcs-ug-0312023.xml", "product_code":"dcs", - "code":"68", + "code":"69", "des":"In most cases, different DCS instance management operations cannot proceed concurrently. If you initiate a new management operation while the current operation is in prog", "doc_type":"usermanual", "kw":"Configuration Notice,Managing DCS Instances,User Guide", @@ -1433,7 +1455,7 @@ "uri":"dcs-ug-0312024.html", "node_id":"dcs-ug-0312024.xml", "product_code":"dcs", - "code":"69", + "code":"70", "des":"You can modify the configuration parameters of your DCS instance to optimize DCS performance based on your requirements.For example, if you do not need data persistence, ", "doc_type":"usermanual", "kw":"Modifying Configuration Parameters,Managing DCS Instances,User Guide", @@ -1454,7 +1476,7 @@ "uri":"dcs-ug-0312025.html", "node_id":"dcs-ug-0312025.xml", "product_code":"dcs", - "code":"70", + "code":"71", "des":"On the DCS console, after creating a DCS instance, you can modify the maintenance time window of the DCS instance on the instance's Basic Information page.At least one DC", "doc_type":"usermanual", "kw":"modify the maintenance time window,Modifying Maintenance Time Window,Managing DCS Instances,User Gui", @@ -1475,7 +1497,7 @@ "uri":"dcs-ug-0312026.html", "node_id":"dcs-ug-0312026.xml", "product_code":"dcs", - "code":"71", + "code":"72", "des":"On the DCS console, after creating a DCS instance, you can modify the security group of the DCS instance on the instance's Basic Information page.You can modify the secur", "doc_type":"usermanual", "kw":"modify the security group,Modifying the Security Group,Managing DCS Instances,User Guide", @@ -1496,7 +1518,7 @@ "uri":"dcs-ug-0312028.html", "node_id":"dcs-ug-0312028.xml", "product_code":"dcs", - "code":"72", + "code":"73", "des":"After you initiate certain instance operations such as modifying instance specifications and changing or resetting a password, a background task will start for the operat", "doc_type":"usermanual", "kw":"Viewing Background Tasks,Managing DCS Instances,User Guide", @@ -1517,7 +1539,7 @@ "uri":"TagManagement.html", "node_id":"tagmanagement.xml", "product_code":"dcs", - "code":"73", + "code":"74", "des":"Tags facilitate DCS instance identification and management.You can add tags to an instance when creating it or add, modify, or delete tags on the details page of a create", "doc_type":"usermanual", "kw":"Managing Tags,Managing DCS Instances,User Guide", @@ -1538,7 +1560,7 @@ "uri":"dcs-ug-210107001.html", "node_id":"dcs-ug-210107001.xml", "product_code":"dcs", - "code":"74", + "code":"75", "des":"This section describes how to query the shards and replicas of a DCS Redis 4.0 or later instance and how to manually promote a replica to master.Currently, this function ", "doc_type":"usermanual", "kw":"Managing Shards and Replicas,Managing DCS Instances,User Guide", @@ -1559,7 +1581,7 @@ "uri":"dcs-ug-190808001.html", "node_id":"dcs-ug-190808001.xml", "product_code":"dcs", - "code":"75", + "code":"76", "des":"By performing big key analysis and hot key analysis, you will have a picture of keys that occupy a large space and keys that are the most frequently accessed.Notes on big", "doc_type":"usermanual", "kw":"Analyzing Big Keys and Hot Keys,Managing DCS Instances,User Guide", @@ -1580,7 +1602,7 @@ "uri":"dcs-ug-210330002.html", "node_id":"dcs-ug-210330002.xml", "product_code":"dcs", - "code":"76", + "code":"77", "des":"There are two ways to delete a key in Redis.Use the DEL command to directly delete a key.Use commands such as EXPIRE to set a timeout on a key. After the timeout elapses,", "doc_type":"usermanual", "kw":"Scanning and Deleting Expired Keys in a DCS Redis Instance,Managing DCS Instances,User Guide", @@ -1601,7 +1623,7 @@ "uri":"dcs-ug-190812001.html", "node_id":"dcs-ug-190812001.xml", "product_code":"dcs", - "code":"77", + "code":"78", "des":"DCS helps you control access to your DCS instances in the following ways, depending on the deployment mode:To control access to DCS Redis 3.0 instances, you can use secur", "doc_type":"usermanual", "kw":"Managing IP Address Whitelist,Managing DCS Instances,User Guide", @@ -1622,7 +1644,7 @@ "uri":"dcs-ug-190926001.html", "node_id":"dcs-ug-190926001.xml", "product_code":"dcs", - "code":"78", + "code":"79", "des":"Redis logs queries that exceed a specified execution time. You can view the slow query log on the DCS console to identify performance issues.For details about the command", "doc_type":"usermanual", "kw":"Viewing Redis Slow Queries,Managing DCS Instances,User Guide", @@ -1643,7 +1665,7 @@ "uri":"dcs-ug-1009001.html", "node_id":"dcs-ug-1009001.xml", "product_code":"dcs", - "code":"79", + "code":"80", "des":"You can create run log files on the DCS console to collect run logs of DCS Redis instances within a specified period. After the logs are collected, you can download the l", "doc_type":"usermanual", "kw":"Viewing Redis Run Logs,Managing DCS Instances,User Guide", @@ -1664,8 +1686,8 @@ "uri":"dcs-ug-210818001.html", "node_id":"dcs-ug-210818001.xml", "product_code":"dcs", - "code":"80", - "des":"If a fault or performance issue occurs, you can ask DCS to diagnose your instance to learn about the cause and impact of the issue and how to handle it.Tested Object: You", + "code":"81", + "des":"If a fault or performance issue occurs, you can ask DCS to diagnose your instance to learn about the cause and impact of the issue and how to handle it.Available for DCS ", "doc_type":"usermanual", "kw":"Diagnosing an Instance,Managing DCS Instances,User Guide", "search_title":"", @@ -1685,7 +1707,7 @@ "uri":"dcs-ug-023129.html", "node_id":"dcs-ug-023129.xml", "product_code":"dcs", - "code":"81", + "code":"82", "des":"Single-node, master/standby, and Redis ClusterDCS Redis 6.0/7.0instances support SSL encryption to ensure data transmission security. This function is not available for o", "doc_type":"usermanual", "kw":"Transmitting DCS Redis Data with Encryption Using SSL,Managing DCS Instances,User Guide", @@ -1706,51 +1728,11 @@ "uri":"dcs-ug-22121.html", "node_id":"dcs-ug-22121.xml", "product_code":"dcs", - "code":"82", + "code":"83", "des":"You can view the client connection information of an instance and disconnect clients.This function is supported by DCS Redis 4.0 instances and later.The session managemen", "doc_type":"usermanual", "kw":"Managing Sessions,Managing DCS Instances,User Guide", "search_title":"", - "metedata":[ - { - "prodname":"dcs", - "documenttype":"usermanual", - "IsMulti":"Yes", - "opensource":"true" - } - ], - "title":"Managing Sessions", - "githuburl":"" - }, - { - "uri":"dcs-ug-221220.html", - "node_id":"dcs-ug-221220.xml", - "product_code":"dcs", - "code":"83", - "des":"You can create read-only and read/write users to control access permissions.This function is supported only by DCS Redis 4.0 and 5.0 instances.Default user: defaultA maxi", - "doc_type":"usermanual", - "kw":"Managing Users,Managing DCS Instances,User Guide", - "search_title":"", - "metedata":[ - { - "prodname":"dcs", - "documenttype":"usermanual", - "IsMulti":"Yes", - "opensource":"true" - } - ], - "title":"Managing Users", - "githuburl":"" - }, - { - "uri":"dcs-ug-0312030.html", - "node_id":"dcs-ug-0312030.xml", - "product_code":"dcs", - "code":"84", - "des":"HUAWEI CLOUD Help Center presents technical documents to help you quickly get started with HUAWEI CLOUD services. The technical documents include Service Overview, Price Details, Purchase Guide, User Guide, API Reference, Best Practices, FAQs, and Videos.", - "doc_type":"usermanual", - "kw":"Backing Up and Restoring DCS Instances", - "search_title":"", "metedata":[ { "prodname":"dcs", @@ -1760,17 +1742,59 @@ "IsBot":"Yes" } ], - "title":"Backing Up and Restoring DCS Instances", + "title":"Managing Sessions", + "githuburl":"" + }, + { + "uri":"dcs-ug-221220.html", + "node_id":"dcs-ug-221220.xml", + "product_code":"dcs", + "code":"84", + "des":"You can create read-only and read/write users to control access permissions.This function is supported only by DCS Redis 4.0 and 5.0 instances.Default user: defaultA maxi", + "doc_type":"usermanual", + "kw":"Managing Users,Managing DCS Instances,User Guide", + "search_title":"", + "metedata":[ + { + "prodname":"dcs", + "opensource":"true", + "documenttype":"usermanual", + "IsMulti":"Yes", + "IsBot":"Yes" + } + ], + "title":"Managing Users", + "githuburl":"" + }, + { + "uri":"dcs-ug-0312030.html", + "node_id":"dcs-ug-0312030.xml", + "product_code":"dcs", + "code":"85", + "des":"HUAWEI CLOUD Help Center presents technical documents to help you quickly get started with HUAWEI CLOUD services. The technical documents include Service Overview, Price Details, Purchase Guide, User Guide, API Reference, Best Practices, FAQs, and Videos.", + "doc_type":"usermanual", + "kw":"Backing Up and Restoring Instance Data", + "search_title":"", + "metedata":[ + { + "prodname":"dcs", + "opensource":"true", + "documenttype":"usermanual", + "IsMulti":"Yes", + "IsBot":"Yes" + } + ], + "title":"Backing Up and Restoring Instance Data", "githuburl":"" }, { "uri":"en-us_topic_0079835992.html", "node_id":"en-us_topic_0079835992.xml", "product_code":"dcs", - "code":"85", + "code":"86", "des":"On the DCS console, you can back up and restore DCS instances.There is a small chance that inconsistent data could exist in a DCS instance owing to service system excepti", "doc_type":"usermanual", - "kw":"back up,restore,Overview,Backing Up and Restoring DCS Instances,User Guide", + "kw":"back up,restore,Overview,Backing Up and Restoring Instance Data,User Guide", "search_title":"", "metedata":[ { @@ -1788,8 +1812,8 @@ "uri":"dcs-ug-0312031.html", "node_id":"dcs-ug-0312031.xml", "product_code":"dcs", - "code":"86", - "des":"On the DCS console, you can configure an automatic backup policy. The system then backs up data in your instances according to the backup policy.By default, automatic bac", + "code":"87", + "des":"On the DCS console, you can configure an automatic backup policy. The system then regularly backs up data in your instances according to the backup policy.By default, aut", "doc_type":"usermanual", "kw":"configure an automatic backup policy,Configuring an Automatic Backup Policy,Backing Up and Restoring", "search_title":"", @@ -1809,10 +1833,10 @@ "uri":"dcs-ug-0312032.html", "node_id":"dcs-ug-0312032.xml", "product_code":"dcs", - "code":"87", - "des":"You need to manually back up data in DCS instances in a timely manner. This section describes how to manually back up data in master/standby instances using the DCS conso", + "code":"88", + "des":"You need to manually back up data in DCS instances in a timely manner. This section describes how to manually back up data in master/standby instances on the DCS console.", "doc_type":"usermanual", - "kw":"manually back up data,Manually Backing Up a DCS Instance,Backing Up and Restoring DCS Instances,User", + "kw":"manually back up data,Manually Backing Up a DCS Instance,Backing Up and Restoring Instance Data,User", "search_title":"", "metedata":[ { @@ -1830,10 +1854,10 @@ "uri":"dcs-ug-0312033.html", "node_id":"dcs-ug-0312033.xml", "product_code":"dcs", - "code":"88", - "des":"On the DCS console, you can restore backup data to a chosen DCS instance.At least one master/standby or cluster DCS instance is in the Running state.A backup task has bee", + "code":"89", + "des":"You can restore backup data to a specific DCS instance.At least one master/standby or cluster DCS instance is in the Running state.A backup task has been run to back up d", "doc_type":"usermanual", - "kw":"restore backup data,Restoring a DCS Instance,Backing Up and Restoring DCS Instances,User Guide", + "kw":"restore backup data,Restoring a DCS Instance,Backing Up and Restoring Instance Data,User Guide", "search_title":"", "metedata":[ { @@ -1851,10 +1875,10 @@ "uri":"dcs-ug-0312034.html", "node_id":"dcs-ug-0312034.xml", "product_code":"dcs", - "code":"89", + "code":"90", "des":"Automatically backed up data can be retained for a maximum of 7 days. Manually backed up data is not free of charge and takes space in OBS. Due to these limitations, you ", "doc_type":"usermanual", - "kw":"Downloading a Backup File,Backing Up and Restoring DCS Instances,User Guide", + "kw":"Downloading a Backup File,Backing Up and Restoring Instance Data,User Guide", "search_title":"", "metedata":[ { @@ -1872,7 +1896,7 @@ "uri":"dcs-ug-0312035.html", "node_id":"dcs-ug-0312035.xml", "product_code":"dcs", - "code":"90", + "code":"91", "des":"HUAWEI CLOUD Help Center presents technical documents to help you quickly get started with HUAWEI CLOUD services. The technical documents include Service Overview, Price Details, Purchase Guide, User Guide, API Reference, Best Practices, FAQs, and Videos.", "doc_type":"usermanual", "kw":"Migrating Data with DCS", @@ -1893,7 +1917,7 @@ "uri":"dcs-ug-0312036.html", "node_id":"dcs-ug-0312036.xml", "product_code":"dcs", - "code":"91", + "code":"92", "des":"DCS for Redis supports online migration (in full or incrementally) and backup migration (by importing backup files).Backup migration is suitable when the source and targe", "doc_type":"usermanual", "kw":"Introduction to Migration with DCS,Migrating Data with DCS,User Guide", @@ -1914,7 +1938,7 @@ "uri":"dcs-ug-210922001.html", "node_id":"dcs-ug-210922001.xml", "product_code":"dcs", - "code":"92", + "code":"93", "des":"HUAWEI CLOUD Help Center presents technical documents to help you quickly get started with HUAWEI CLOUD services. The technical documents include Service Overview, Price Details, Purchase Guide, User Guide, API Reference, Best Practices, FAQs, and Videos.", "doc_type":"usermanual", "kw":"Importing Backup Files", @@ -1935,7 +1959,7 @@ "uri":"dcs-ug-0312037.html", "node_id":"dcs-ug-0312037.xml", "product_code":"dcs", - "code":"93", + "code":"94", "des":"Use the DCS console to migrate backup data to DCS for Redis.Simply download the source Redis backup data and then upload the data to an OBS bucket in the same region as t", "doc_type":"usermanual", "kw":"Importing Backup Files from an OBS Bucket,Importing Backup Files,User Guide", @@ -1956,7 +1980,7 @@ "uri":"dcs-ug-210226001.html", "node_id":"dcs-ug-210226001.xml", "product_code":"dcs", - "code":"94", + "code":"95", "des":"Use the DCS console to migrate Redis data from self-hosted Redis to DCS for Redis.Simply back up your Redis data, create a migration task on the DCS console, and then imp", "doc_type":"usermanual", "kw":"Importing Backup Files from Redis,Importing Backup Files,User Guide", @@ -1977,7 +2001,7 @@ "uri":"dcs-ug-0312038.html", "node_id":"dcs-ug-0312038.xml", "product_code":"dcs", - "code":"95", + "code":"96", "des":"If the source and target instances are interconnected and the SYNC and PSYNC commands are supported in the source instance, data can be migrated online in full or increme", "doc_type":"usermanual", "kw":"Migrating Data Online,Migrating Data with DCS,User Guide", @@ -1998,7 +2022,7 @@ "uri":"dcs-ug-210820001.html", "node_id":"dcs-ug-210820001.xml", "product_code":"dcs", - "code":"96", + "code":"97", "des":"Currently, you cannot change the instance type when using the specification modification function. To modify instance specifications while changing the instance type, you", "doc_type":"usermanual", "kw":"Switching DCS Instance IP Addresses,Migrating Data with DCS,User Guide", @@ -2019,7 +2043,7 @@ "uri":"dcs-ug-0312039.html", "node_id":"dcs-ug-0312039.xml", "product_code":"dcs", - "code":"97", + "code":"98", "des":"HUAWEI CLOUD Help Center presents technical documents to help you quickly get started with HUAWEI CLOUD services. The technical documents include Service Overview, Price Details, Purchase Guide, User Guide, API Reference, Best Practices, FAQs, and Videos.", "doc_type":"usermanual", "kw":"Managing Passwords", @@ -2040,7 +2064,7 @@ "uri":"cache-instance-password.html", "node_id":"cache-instance-password.xml", "product_code":"dcs", - "code":"98", + "code":"99", "des":"Passwords can be configured to control access to your DCS instances, ensuring the security of your data.After 5 consecutive incorrect password attempts, the account for a", "doc_type":"usermanual", "kw":"DCS Instance Passwords,Managing Passwords,User Guide", @@ -2061,7 +2085,7 @@ "uri":"dcs-ug-0312040.html", "node_id":"dcs-ug-0312040.xml", "product_code":"dcs", - "code":"99", + "code":"100", "des":"On the DCS console, you can change the password required for accessing your DCS instance.You cannot change the password of a DCS instance in password-free mode.The DCS in", "doc_type":"usermanual", "kw":"Changing Instance Passwords,Managing Passwords,User Guide", @@ -2082,7 +2106,7 @@ "uri":"dcs-ug-0312041.html", "node_id":"dcs-ug-0312041.xml", "product_code":"dcs", - "code":"100", + "code":"101", "des":"On the DCS console, you can configure a new password if you forget your instance password.For a DCS Redis instance, you can change it from password mode to password-free ", "doc_type":"usermanual", "kw":"configure a new password,Resetting Instance Passwords,Managing Passwords,User Guide", @@ -2103,7 +2127,7 @@ "uri":"dcs-ug-0312042.html", "node_id":"dcs-ug-0312042.xml", "product_code":"dcs", - "code":"101", + "code":"102", "des":"DCS Redis instances can be accessed with or without passwords. After an instance is created, you can change its password setting in the following scenarios:To access a DC", "doc_type":"usermanual", "kw":"enable password-free access,Changing Password Settings for DCS Redis Instances,Managing Passwords,Us", @@ -2124,7 +2148,7 @@ "uri":"dcs-ug-210622001.html", "node_id":"dcs-ug-210622001.xml", "product_code":"dcs", - "code":"102", + "code":"103", "des":"HUAWEI CLOUD Help Center presents technical documents to help you quickly get started with HUAWEI CLOUD services. The technical documents include Service Overview, Price Details, Purchase Guide, User Guide, API Reference, Best Practices, FAQs, and Videos.", "doc_type":"usermanual", "kw":"Parameter Templates", @@ -2145,7 +2169,7 @@ "uri":"dcs-ug-210622002.html", "node_id":"dcs-ug-210622002.xml", "product_code":"dcs", - "code":"103", + "code":"104", "des":"This section describes how to view parameter templates on the DCS console.Currently, you can enter a keyword in the search box to search for a parameter template by templ", "doc_type":"usermanual", "kw":"Viewing Parameter Templates,Parameter Templates,User Guide", @@ -2166,7 +2190,7 @@ "uri":"dcs-ug-210622003.html", "node_id":"dcs-ug-210622003.xml", "product_code":"dcs", - "code":"104", + "code":"105", "des":"You can create custom parameter templates for different cache engine versions and instance types based on service requirements.If you select Default Templates, click Cust", "doc_type":"usermanual", "kw":"Creating a Custom Parameter Template,Parameter Templates,User Guide", @@ -2187,7 +2211,7 @@ "uri":"dcs-ug-210622004.html", "node_id":"dcs-ug-210622004.xml", "product_code":"dcs", - "code":"105", + "code":"106", "des":"You can modify the name, description, and parameters of a custom parameter template based on service requirements.Click Edit in the Operation column.Change the name or mo", "doc_type":"usermanual", "kw":"Modifying a Custom Parameter Template,Parameter Templates,User Guide", @@ -2208,7 +2232,7 @@ "uri":"dcs-ug-210622005.html", "node_id":"dcs-ug-210622005.xml", "product_code":"dcs", - "code":"106", + "code":"107", "des":"This section describes how to delete a custom parameter template.", "doc_type":"usermanual", "kw":"Deleting a Custom Parameter Template,Parameter Templates,User Guide", @@ -2229,7 +2253,7 @@ "uri":"dcs-ug-0326016.html", "node_id":"dcs-ug-0326016.xml", "product_code":"dcs", - "code":"107", + "code":"108", "des":"HUAWEI CLOUD Help Center presents technical documents to help you quickly get started with HUAWEI CLOUD services. The technical documents include Service Overview, Price Details, Purchase Guide, User Guide, API Reference, Best Practices, FAQs, and Videos.", "doc_type":"usermanual", "kw":"Monitoring", @@ -2250,7 +2274,7 @@ "uri":"dcs-ug-0326019.html", "node_id":"dcs-ug-0326019.xml", "product_code":"dcs", - "code":"108", + "code":"109", "des":"This section describes DCS metrics reported to Cloud Eye as well as their namespaces and dimensions. You can use the Cloud Eye console or call APIs to query the DCS metri", "doc_type":"usermanual", "kw":"DCS Metrics,Monitoring,User Guide", @@ -2271,7 +2295,7 @@ "uri":"dcs-ug-0312045.html", "node_id":"dcs-ug-0312045.xml", "product_code":"dcs", - "code":"109", + "code":"110", "des":"You can view DCS instance metrics on the Performance Monitoring page.You can also click View Metric in the Operation column on the Cache Manager page. You will be redirec", "doc_type":"usermanual", "kw":"Viewing DCS Monitoring Metrics,Monitoring,User Guide", @@ -2292,7 +2316,7 @@ "uri":"dcs-ug-190905001.html", "node_id":"dcs-ug-190905001.xml", "product_code":"dcs", - "code":"110", + "code":"111", "des":"This section describes the alarm rules of some metrics and how to configure the rules. In actual scenarios, configure alarm rules for metrics by referring to the followin", "doc_type":"usermanual", "kw":"Configuring Alarm Rules for Critical Metrics,Monitoring,User Guide", @@ -2313,7 +2337,7 @@ "uri":"dcs-ug-0326017.html", "node_id":"dcs-ug-0326017.xml", "product_code":"dcs", - "code":"111", + "code":"112", "des":"HUAWEI CLOUD Help Center presents technical documents to help you quickly get started with HUAWEI CLOUD services. The technical documents include Service Overview, Price Details, Purchase Guide, User Guide, API Reference, Best Practices, FAQs, and Videos.", "doc_type":"usermanual", "kw":"Auditing", @@ -2334,7 +2358,7 @@ "uri":"dcs-ug-0326018.html", "node_id":"dcs-ug-0326018.xml", "product_code":"dcs", - "code":"112", + "code":"113", "des":"With CTS, you can query, audit, and review operations performed on cloud resources. Traces include the operation requests sent using the management console or open APIs a", "doc_type":"usermanual", "kw":"DCS operations that can be recorded by CTS,Operations That Can Be Recorded by CTS,Auditing,User Guid", @@ -2355,7 +2379,7 @@ "uri":"dcs-ug-0312047.html", "node_id":"dcs-ug-0312047.xml", "product_code":"dcs", - "code":"113", + "code":"114", "des":"After CTS is enabled, the tracker starts recording operations on cloud resources. Operation records for the last seven days can be viewed on the CTS console. This section", "doc_type":"usermanual", "kw":"Viewing Traces on the CTS Console,Auditing,User Guide", @@ -2376,7 +2400,7 @@ "uri":"dcs-migration-230313.html", "node_id":"dcs-migration-230313.xml", "product_code":"dcs", - "code":"114", + "code":"115", "des":"HUAWEI CLOUD Help Center presents technical documents to help you quickly get started with HUAWEI CLOUD services. The technical documents include Service Overview, Price Details, Purchase Guide, User Guide, API Reference, Best Practices, FAQs, and Videos.", "doc_type":"usermanual", "kw":"Data Migration Guide", @@ -2397,7 +2421,7 @@ "uri":"dcs-migration-0713001.html", "node_id":"dcs-migration-0713001.xml", "product_code":"dcs", - "code":"115", + "code":"116", "des":"Due to variations of Redis application environments and scenarios, migration solutions must be detailed to address actual requirements. The time required for data migrati", "doc_type":"usermanual", "kw":"Overview,Data Migration Guide,User Guide", @@ -2415,7 +2439,7 @@ "uri":"dcs-migration-0312001.html", "node_id":"dcs-migration-0312001.xml", "product_code":"dcs", - "code":"116", + "code":"117", "des":"Collect the following information about the cached data to be migrated (based on Information to be collected for the migration):Number of instancesNumber of databases (DB", "doc_type":"usermanual", "kw":"Migration Process,Data Migration Guide,User Guide", @@ -2433,7 +2457,7 @@ "uri":"dcs-migration-090626002.html", "node_id":"dcs-migration-090626002.xml", "product_code":"dcs", - "code":"117", + "code":"118", "des":"Self-hosted Redis refers to self-hosted Redis on this service, in another cloud, or in on-premises data centers.", "doc_type":"usermanual", "kw":"Migration Solution Notes,Data Migration Guide,User Guide", @@ -2451,7 +2475,7 @@ "uri":"dcs-migration-0312002.html", "node_id":"dcs-migration-0312002.xml", "product_code":"dcs", - "code":"118", + "code":"119", "des":"HUAWEI CLOUD Help Center presents technical documents to help you quickly get started with HUAWEI CLOUD services. The technical documents include Service Overview, Price Details, Purchase Guide, User Guide, API Reference, Best Practices, FAQs, and Videos.", "doc_type":"usermanual", "kw":"Migrating Data from Self-Hosted Redis to DCS", @@ -2469,7 +2493,7 @@ "uri":"dcs-migration-190703003.html", "node_id":"dcs-migration-190703003.xml", "product_code":"dcs", - "code":"119", + "code":"120", "des":"If the source self-host and target instances are interconnected and the SYNC and PSYNC commands are supported by the source instance, data can be migrated online in full ", "doc_type":"usermanual", "kw":"Migrating Self-Built Redis Online,Migrating Data from Self-Hosted Redis to DCS,User Guide", @@ -2487,7 +2511,7 @@ "uri":"dcs-migration-190703002.html", "node_id":"dcs-migration-190703002.xml", "product_code":"dcs", - "code":"120", + "code":"121", "des":"This section describes how to migrate self-hosted Redis to DCS by importing backup files.Simply download the source Redis data and then upload the data to an OBS bucket i", "doc_type":"usermanual", "kw":"Self-Hosted Redis Migration with Backup Files,Migrating Data from Self-Hosted Redis to DCS,User Guid", @@ -2505,7 +2529,7 @@ "uri":"dcs-migration-0312010.html", "node_id":"dcs-migration-0312010.xml", "product_code":"dcs", - "code":"121", + "code":"122", "des":"redis-cli is the command line tool of Redis, which can be used after you install the Redis server. This section describes how to use redis-cli to migrate a data from a se", "doc_type":"usermanual", "kw":"Self-Hosted Redis Migration with redis-cli (AOF),Migrating Data from Self-Hosted Redis to DCS,User G", @@ -2523,7 +2547,7 @@ "uri":"dcs-migration-0312011.html", "node_id":"dcs-migration-0312011.xml", "product_code":"dcs", - "code":"122", + "code":"123", "des":"redis-cli is the command line tool of Redis, which can be used after you install the Redis server. redis-cli supports data export as an RDB file. If your Redis service do", "doc_type":"usermanual", "kw":"Self-Hosted Redis Migration with redis-cli (RDB),Migrating Data from Self-Hosted Redis to DCS,User G", @@ -2541,7 +2565,7 @@ "uri":"dcs-migrate-demo02.html", "node_id":"dcs-migrate-demo02.xml", "product_code":"dcs", - "code":"123", + "code":"124", "des":"redis-shake is an open-source tool for migrating data online or offline (by importing backup files) between Redis Clusters. Data can be migrated to DCS Redis Cluster inst", "doc_type":"usermanual", "kw":"Self-Hosted Redis Cluster Migration with redis-shake (Online),Migrating Data from Self-Hosted Redis ", @@ -2559,7 +2583,7 @@ "uri":"dcs-migrate-demo03.html", "node_id":"dcs-migrate-demo03.xml", "product_code":"dcs", - "code":"124", + "code":"125", "des":"redis-shake is an open-source tool for migrating data online or offline (by importing backup files) between Redis Clusters. Data can be migrated to DCS Redis Cluster inst", "doc_type":"usermanual", "kw":"Self-Hosted Redis Cluster Migration with redis-shake (RDB),Migrating Data from Self-Hosted Redis to ", @@ -2577,7 +2601,7 @@ "uri":"dcs-migration-0312008.html", "node_id":"dcs-migration-0312008.xml", "product_code":"dcs", - "code":"125", + "code":"126", "des":"HUAWEI CLOUD Help Center presents technical documents to help you quickly get started with HUAWEI CLOUD services. The technical documents include Service Overview, Price Details, Purchase Guide, User Guide, API Reference, Best Practices, FAQs, and Videos.", "doc_type":"usermanual", "kw":"Migrating Data Between DCS Instances", @@ -2595,7 +2619,7 @@ "uri":"dcs-migration-0312003.html", "node_id":"dcs-migration-0312003.xml", "product_code":"dcs", - "code":"126", + "code":"127", "des":"If the source and target instances are interconnected and the SYNC and PSYNC commands are supported by the source instance, data can be migrated online in full or increme", "doc_type":"usermanual", "kw":"Online Migration Between Instances,Migrating Data Between DCS Instances,User Guide", @@ -2613,8 +2637,8 @@ "uri":"dcs-migration-0312004.html", "node_id":"dcs-migration-0312004.xml", "product_code":"dcs", - "code":"127", - "des":"You can migrate data between DCS instances by importing backup files.If the source Redis and target Redis are in the same region under the same DCS account, and the sourc", + "code":"128", + "des":"You can migrate data between DCS instances by importing backup files.To migrate to an instance with SSL enabled, disable the SSL setting first. For details, see Transmitt", "doc_type":"usermanual", "kw":"Backup Import Between DCS Redis Instances,Migrating Data Between DCS Instances,User Guide", "search_title":"", @@ -2631,7 +2655,7 @@ "uri":"dcs-migration-0312005.html", "node_id":"dcs-migration-0312005.xml", "product_code":"dcs", - "code":"128", + "code":"129", "des":"HUAWEI CLOUD Help Center presents technical documents to help you quickly get started with HUAWEI CLOUD services. The technical documents include Service Overview, Price Details, Purchase Guide, User Guide, API Reference, Best Practices, FAQs, and Videos.", "doc_type":"usermanual", "kw":"Migration from Another Cloud", @@ -2649,7 +2673,7 @@ "uri":"dcs-migration-0312006.html", "node_id":"dcs-migration-0312006.xml", "product_code":"dcs", - "code":"129", + "code":"130", "des":"If the source and target instances are interconnected and the SYNC and PSYNC commands are supported by the source instance, data can be migrated online in full or increme", "doc_type":"usermanual", "kw":"Migrating Redis from Another Cloud Online,Migration from Another Cloud,User Guide", @@ -2667,7 +2691,7 @@ "uri":"dcs-migration-1117001.html", "node_id":"dcs-migration-1117001.xml", "product_code":"dcs", - "code":"130", + "code":"131", "des":"This section describes how to migrate Redis from another cloud to DCS by importing backup files.Simply download the source Redis data and then upload the data to an OBS b", "doc_type":"usermanual", "kw":"Backup Import from Another Cloud,Migration from Another Cloud,User Guide", @@ -2685,7 +2709,7 @@ "uri":"dcs-migration-090626001_0.html", "node_id":"dcs-migration-090626001_0.xml", "product_code":"dcs", - "code":"131", + "code":"132", "des":"Redis instances provided by some cloud service vendors do not allow SLAVEOF, BGSAVE, and PSYNC commands to be issued from Redis clients. As a result, redis-cli, redis-sha", "doc_type":"usermanual", "kw":"Online Migration from Another Cloud Using Rump,Migration from Another Cloud,User Guide", @@ -2703,7 +2727,7 @@ "uri":"dcs-migrate-1117003.html", "node_id":"dcs-migrate-1117003.xml", "product_code":"dcs", - "code":"132", + "code":"133", "des":"redis-shake is an open-source tool for migrating data online or offline (by importing backup files) between Redis Clusters. If the source Redis Cluster is deployed in ano", "doc_type":"usermanual", "kw":"Backup Import from Another Cloud Using redis-shake,Migration from Another Cloud,User Guide", @@ -2721,7 +2745,7 @@ "uri":"dcs-migrate-0220411.html", "node_id":"dcs-migrate-0220411.xml", "product_code":"dcs", - "code":"133", + "code":"134", "des":"redis-shake is an open-source Redis migration tool. Its rump mode allows you to obtain the full data of a source Redis using the SCAN command and write the data to a targ", "doc_type":"usermanual", "kw":"Migrating from Another Cloud Online Using redis-shake,Migration from Another Cloud,User Guide", @@ -2739,7 +2763,7 @@ "uri":"dcs-migration-0312007.html", "node_id":"dcs-migration-0312007.xml", "product_code":"dcs", - "code":"134", + "code":"135", "des":"You can use the online migration function of the DCS console to migrate DCS Redis instances to your self-hosted Redis. You can also export the DCS instance data to an RDB", "doc_type":"usermanual", "kw":"Migrating Data from DCS to Self-Hosted Redis,Data Migration Guide,User Guide", @@ -2757,7 +2781,7 @@ "uri":"dcs-faq-0326019.html", "node_id":"dcs-faq-0326019.xml", "product_code":"dcs", - "code":"135", + "code":"136", "des":"HUAWEI CLOUD Help Center presents technical documents to help you quickly get started with HUAWEI CLOUD services. The technical documents include Service Overview, Price Details, Purchase Guide, User Guide, API Reference, Best Practices, FAQs, and Videos.", "doc_type":"usermanual", "kw":"FAQs", @@ -2778,7 +2802,7 @@ "uri":"dcs-faq-0326020.html", "node_id":"dcs-faq-0326020.xml", "product_code":"dcs", - "code":"136", + "code":"137", "des":"HUAWEI CLOUD Help Center presents technical documents to help you quickly get started with HUAWEI CLOUD services. The technical documents include Service Overview, Price Details, Purchase Guide, User Guide, API Reference, Best Practices, FAQs, and Videos.", "doc_type":"usermanual", "kw":"Client and Network Connection", @@ -2799,7 +2823,7 @@ "uri":"en-us_topic_0090662012.html", "node_id":"en-us_topic_0090662012.xml", "product_code":"dcs", - "code":"137", + "code":"138", "des":"DCS helps you control access to your DCS instances in the following ways, depending on the deployment mode:To control access to DCS Redis 3.0 instances, you can use secur", "doc_type":"usermanual", "kw":"Security Group Configurations,Client and Network Connection,User Guide", @@ -2820,7 +2844,7 @@ "uri":"dcs-faq-0730001.html", "node_id":"dcs-faq-0730001.xml", "product_code":"dcs", - "code":"138", + "code":"139", "des":"No. DCS instances cannot be accessed at their EIPs over public networks. To ensure security, the ECS that serves as a client and the DCS instance that the client will acc", "doc_type":"usermanual", "kw":"Does DCS Support Access over Public Networks?,Client and Network Connection,User Guide", @@ -2841,7 +2865,7 @@ "uri":"en-us_topic_0100698850.html", "node_id":"en-us_topic_0100698850.xml", "product_code":"dcs", - "code":"139", + "code":"140", "des":"Cross-VPC means the client and the instance are not in the same VPC.Generally, VPCs are isolated from each other and ECSs cannot access DCS instances that belong to a dif", "doc_type":"usermanual", "kw":"VPC peering connections,across VPCs,Does DCS Support Cross-VPC Access?,Client and Network Connection", @@ -2862,7 +2886,7 @@ "uri":"dcs-faq-0427005.html", "node_id":"dcs-faq-0427005.xml", "product_code":"dcs", - "code":"140", + "code":"141", "des":"This is because you have enabled password-free access for the instance. To prevent the error message from appearing, do not enter any password.", "doc_type":"usermanual", "kw":"Why Is \"(error) NOAUTH Authentication required\" Displayed When I Access a DCS Redis Instance?,Client", @@ -2883,7 +2907,7 @@ "uri":"dcs-faq-0730004.html", "node_id":"dcs-faq-0730004.xml", "product_code":"dcs", - "code":"141", + "code":"142", "des":"Analysis: If persistent connections (\"pconnect\" in Redis terminology) or connection pooling is used and connections are closed after being used for connecting to DCS inst", "doc_type":"usermanual", "kw":"What Should I Do If Access to DCS Fails After Server Disconnects?,Client and Network Connection,User", @@ -2904,7 +2928,7 @@ "uri":"dcs-faq-0730005.html", "node_id":"dcs-faq-0730005.xml", "product_code":"dcs", - "code":"142", + "code":"143", "des":"Occasional timeout errors are normal because of network connectivity and client timeout configurations.You are advised to include reconnection operations into your servic", "doc_type":"usermanual", "kw":"Why Do Requests Sometimes Time Out in Clients?,Client and Network Connection,User Guide", @@ -2925,7 +2949,7 @@ "uri":"dcs-faq-0730006.html", "node_id":"dcs-faq-0730006.xml", "product_code":"dcs", - "code":"143", + "code":"144", "des":"The error message that will possibly be displayed when you use the Jedis connection pool is as follows:If this error message is displayed, check whether your instance is ", "doc_type":"usermanual", "kw":"use the Jedis connection pool,Jedis client,TIME_WAIT,What Should I Do If an Error Is Returned When I", @@ -2946,7 +2970,7 @@ "uri":"dcs-faq-0730007.html", "node_id":"dcs-faq-0730007.xml", "product_code":"dcs", - "code":"144", + "code":"145", "des":"The possible causes are as follows:The command is spelled incorrectly.As shown in the following figure, the error message is returned because the correct command for dele", "doc_type":"usermanual", "kw":"Why Is \"ERR unknown command\" Displayed When I Access a DCS Redis Instance Through a Redis Client?,Cl", @@ -2967,7 +2991,7 @@ "uri":"dcs-faq-0730008.html", "node_id":"dcs-faq-0730008.xml", "product_code":"dcs", - "code":"145", + "code":"146", "des":"You can access a DCS Redis instance through the Redis Desktop Manager within a VPC.Enter the address, port number (6379), and authentication password of the DCS instance ", "doc_type":"usermanual", "kw":"How Do I Access a DCS Redis Instance Through Redis Desktop Manager?,Client and Network Connection,Us", @@ -2988,7 +3012,7 @@ "uri":"dcs-faq-0730009.html", "node_id":"dcs-faq-0730009.xml", "product_code":"dcs", - "code":"146", + "code":"147", "des":"By using DCS Redis instances, Spring Session can implement session sharing. When interconnecting with Spring Cloud, the following error information is displayed:For secur", "doc_type":"usermanual", "kw":"Spring Session can implement session sharing,What If \"ERR Unsupported CONFIG subcommand\" is Displaye", @@ -3009,7 +3033,7 @@ "uri":"dcs-faq-0427015.html", "node_id":"dcs-faq-0427015.xml", "product_code":"dcs", - "code":"147", + "code":"148", "des":"A DCS Redis instance can be access with or without a password. You can directly access a DCS Redis instance through a Redis client without setting a password. However, fo", "doc_type":"usermanual", "kw":"Is a Password Required for Accessing an Instance? How Do I Set a Password?,Client and Network Connec", @@ -3030,7 +3054,7 @@ "uri":"dcs-faq-0730011.html", "node_id":"dcs-faq-0730011.xml", "product_code":"dcs", - "code":"148", + "code":"149", "des":"Pay attention to the following issues when using Redis for pub/sub:Your client must process messages in a timely manner.Your client subscribes to a channel. If it does no", "doc_type":"usermanual", "kw":"Redis for pub/sub,What Should Be Noted When Using Redis for Pub/Sub?,Client and Network Connection,U", @@ -3051,7 +3075,7 @@ "uri":"dcs-faq-0730010.html", "node_id":"dcs-faq-0730010.xml", "product_code":"dcs", - "code":"149", + "code":"150", "des":"Preliminary checks:Check the connection address.Obtain the connection address from the instance basic information page on the DCS console.Obtain the connection address fr", "doc_type":"usermanual", "kw":"How Do I Troubleshoot Redis Connection Failures?,Client and Network Connection,User Guide", @@ -3072,7 +3096,7 @@ "uri":"dcs-faq-210721003.html", "node_id":"dcs-faq-210721003.xml", "product_code":"dcs", - "code":"150", + "code":"151", "des":"Error message \"Cannot assign requested address\" is returned when you access Redis using connect.Applications that encounter this error typically use php-fpm and phpredis.", "doc_type":"usermanual", "kw":"What Can I Do If Error \"Cannot assign requested address\" Is Returned When I Access Redis Using conne", @@ -3093,7 +3117,7 @@ "uri":"dcs-faq-211230001.html", "node_id":"dcs-faq-211230001.xml", "product_code":"dcs", - "code":"151", + "code":"152", "des":"The comparison between Lettuce and Jedis is as follows:LettuceLettuce does not perform connection keepalive detection. If an abnormal connection exists in the connection ", "doc_type":"usermanual", "kw":"Connection Pool Selection and Recommended Jedis Parameter Settings,Client and Network Connection,Use", @@ -3114,7 +3138,7 @@ "uri":"dcs-faq-022025.html", "node_id":"dcs-faq-022025.xml", "product_code":"dcs", - "code":"152", + "code":"153", "des":"Single-node, read/write splitting, and Proxy Cluster:Each instance has only one IP address and one domain name address. The addresses remain unchanged before and after ma", "doc_type":"usermanual", "kw":"Should I Use a Domain Name or an IP Address to Connect to a DCS Redis Instance?,Client and Network C", @@ -3135,7 +3159,7 @@ "uri":"dcs-faq-221222.html", "node_id":"dcs-faq-221222.xml", "product_code":"dcs", - "code":"153", + "code":"154", "des":"A master/standby DCS Redis 4.0 or later instance has a Connection Address and a Read-only Address. The connection address is used to connect to the master node of the ins", "doc_type":"usermanual", "kw":"Is the Read-only Address of a Master/Standby Instance Connected to the Master or Standby Node?,Clien", @@ -3156,7 +3180,7 @@ "uri":"dcs-faq-0326021.html", "node_id":"dcs-faq-0326021.xml", "product_code":"dcs", - "code":"154", + "code":"155", "des":"HUAWEI CLOUD Help Center presents technical documents to help you quickly get started with HUAWEI CLOUD services. The technical documents include Service Overview, Price Details, Purchase Guide, User Guide, API Reference, Best Practices, FAQs, and Videos.", "doc_type":"usermanual", "kw":"Redis Usage", @@ -3177,7 +3201,7 @@ "uri":"dcs-faq-0730012.html", "node_id":"dcs-faq-0730012.xml", "product_code":"dcs", - "code":"155", + "code":"156", "des":"Possible cause 1:The service QPS is so high that the CPU usage spikes to 100%.The service QPS is so high that the CPU usage spikes to 100%.Possible cause 2:You have run c", "doc_type":"usermanual", "kw":"Why Is CPU Usage of a DCS Redis Instance 100%?,Redis Usage,User Guide", @@ -3198,7 +3222,7 @@ "uri":"dcs-faq-0730013.html", "node_id":"dcs-faq-0730013.xml", "product_code":"dcs", - "code":"156", + "code":"157", "des":"No. Once an instance is created, its VPC and subnet cannot be changed. If you want to use a different set of VPC and subnet, create a same instance and specify a desired ", "doc_type":"usermanual", "kw":"Can I Change the VPC and Subnet for a DCS Redis Instance?,Redis Usage,User Guide", @@ -3219,7 +3243,7 @@ "uri":"dcs-faq-0730014.html", "node_id":"dcs-faq-0730014.xml", "product_code":"dcs", - "code":"157", + "code":"158", "des":"Currently, DCS Redis 4.0 and later instances use VPC endpoints and do not support security groups. You can configure whitelists instead. For details, see Managing IP Addr", "doc_type":"usermanual", "kw":"Why Aren't Security Groups Configured for DCS Redis 4.0 and Later Instances?,Redis Usage,User Guide", @@ -3240,7 +3264,7 @@ "uri":"dcs-faq-0730015.html", "node_id":"dcs-faq-0730015.xml", "product_code":"dcs", - "code":"158", + "code":"159", "des":"The maximum allowed size of a key is 512 MB.To reduce memory usage and facilitate key query, ensure that each key does not exceed 1 KB.To reduce memory usage and facilita", "doc_type":"usermanual", "kw":"Do DCS Redis Instances Limit the Size of a Key or Value?,Redis Usage,User Guide", @@ -3261,7 +3285,7 @@ "uri":"dcs-faq-0730017.html", "node_id":"dcs-faq-0730017.xml", "product_code":"dcs", - "code":"159", + "code":"160", "des":"Cluster DCS Redis 3.0 instances (Proxy Cluster type) are used in the same way that you use single-node or master/standby instances. You do not need to know the backend no", "doc_type":"usermanual", "kw":"Can I Obtain the Addresses of the Nodes in a Cluster DCS Redis Instance?,Redis Usage,User Guide", @@ -3282,7 +3306,7 @@ "uri":"dcs-faq-0730018.html", "node_id":"dcs-faq-0730018.xml", "product_code":"dcs", - "code":"160", + "code":"161", "des":"DCS Redis 3.0 instances are deployed on VMs and some memory is reserved for system overheads. This problem will not occur on other instance versions.", "doc_type":"usermanual", "kw":"Why Is Available Memory Smaller Than Instance Cache Size?,Redis Usage,User Guide", @@ -3300,13 +3324,13 @@ "githuburl":"" }, { - "uri":"dcs-faq-0730019.html", - "node_id":"dcs-faq-0730019.xml", + "uri":"dcs-faq-0427028.html", + "node_id":"dcs-faq-0427028.xml", "product_code":"dcs", - "code":"161", - "des":"Both single-node and master/standby DCS Redis instances support multiple databases. By default, single-node and master/standby DCS instances can read and write data in 25", + "code":"162", + "des":"DCS's support for multiple databases (multi-DB) is as follows:Single-node, read/write splitting, and master/standby DCS Redis instances: Multi-DB is supported. By default", "doc_type":"usermanual", - "kw":"DCS Redis instances support multiple databases,Does DCS for Redis Support Multiple Databases?,Redis ", + "kw":"Does DCS for Redis Support Multi-DB?,Redis Usage,User Guide", "search_title":"", "metedata":[ { @@ -3317,14 +3341,14 @@ "IsBot":"Yes" } ], - "title":"Does DCS for Redis Support Multiple Databases?", + "title":"Does DCS for Redis Support Multi-DB?", "githuburl":"" }, { "uri":"dcs-faq-0730020.html", "node_id":"dcs-faq-0730020.xml", "product_code":"dcs", - "code":"162", + "code":"163", "des":"Yes. DCS for Redis 4.0 and later support Redis Clusters. DCS for Redis 3.0 supports Proxy Clusters.", "doc_type":"usermanual", "kw":"Does DCS for Redis Support Redis Clusters?,Redis Usage,User Guide", @@ -3345,7 +3369,7 @@ "uri":"dcs-faq-0730021.html", "node_id":"dcs-faq-0730021.xml", "product_code":"dcs", - "code":"163", + "code":"164", "des":"Master/Standby, read/write splitting, and cluster DCS Redis 4.0 and later instances support Sentinels (Each shard of a cluster is a master/standby instance.). Sentinels m", "doc_type":"usermanual", "kw":"Does DCS for Redis Support Sentinel?,Redis Usage,User Guide", @@ -3366,7 +3390,7 @@ "uri":"dcs-faq-0730022.html", "node_id":"dcs-faq-0730022.xml", "product_code":"dcs", - "code":"164", + "code":"165", "des":"Data is evicted from cache based on a user-defined space limit in order to make space for new data. For details, see the Redis official website. You can view or change th", "doc_type":"usermanual", "kw":"What Is the Default Data Eviction Policy?,Redis Usage,User Guide", @@ -3387,7 +3411,7 @@ "uri":"dcs-faq-0730023.html", "node_id":"dcs-faq-0730023.xml", "product_code":"dcs", - "code":"165", + "code":"166", "des":"Start the Redis exporter using the CLI. Based on the output, check for errors and troubleshoot accordingly.", "doc_type":"usermanual", "kw":"What Should I Do If an Error Occurs in Redis Exporter?,Redis Usage,User Guide", @@ -3408,7 +3432,7 @@ "uri":"dcs-faq-0730025.html", "node_id":"dcs-faq-0730025.xml", "product_code":"dcs", - "code":"166", + "code":"167", "des":"Redisson implements lock acquisition and unlocking in the following process:Redisson lock acquisition and unlocking are implemented by running Lua scripts.During lock acq", "doc_type":"usermanual", "kw":"Why Is Redisson Distributed Lock Not Supported by DCS Proxy Cluster Redis 3.0 Instances?,Redis Usage", @@ -3429,7 +3453,7 @@ "uri":"dcs-faq-0730026.html", "node_id":"dcs-faq-0730026.xml", "product_code":"dcs", - "code":"167", + "code":"168", "des":"You cannot customize or change the port for accessing a DCS Redis 3.0 instance. You can customize (during instance creation) and change the port (on the instance details ", "doc_type":"usermanual", "kw":"Can I Customize or Change the Port for Accessing a DCS Instance?,Redis Usage,User Guide", @@ -3450,7 +3474,7 @@ "uri":"dcs-faq-0730027.html", "node_id":"dcs-faq-0730027.xml", "product_code":"dcs", - "code":"168", + "code":"169", "des":"After a DCS instance is created, its intra-VPC connection addresses cannot be modified.To use a different IP address, you must create a new instance and manually specify ", "doc_type":"usermanual", "kw":"Can I Modify the Connection Addresses for Accessing a DCS Instance?,Redis Usage,User Guide", @@ -3471,7 +3495,7 @@ "uri":"dcs-faq-0730029.html", "node_id":"dcs-faq-0730029.xml", "product_code":"dcs", - "code":"169", + "code":"170", "des":"Master/Standby, read/write splitting, and cluster DCS Redis instances can be deployed across availability zones (AZs).If instance nodes in an AZ are faulty, nodes in othe", "doc_type":"usermanual", "kw":"Does DCS Support Cross-AZ Deployment?,Redis Usage,User Guide", @@ -3492,7 +3516,7 @@ "uri":"dcs-faq-0730030.html", "node_id":"dcs-faq-0730030.xml", "product_code":"dcs", - "code":"170", + "code":"171", "des":"Possible cause: When a cluster instance is started, status and data are synchronized between the nodes of the instance. If a large amount of data is continuously written ", "doc_type":"usermanual", "kw":"Why Does It Take a Long Time to Start a Cluster DCS Instance?,Redis Usage,User Guide", @@ -3513,7 +3537,7 @@ "uri":"dcs-faq-0730032.html", "node_id":"dcs-faq-0730032.xml", "product_code":"dcs", - "code":"171", + "code":"172", "des":"No. If you wish to query Redis configurations and usage information, use redis-cli. If you wish to monitor DCS Redis instance metrics, go to the Cloud Eye console. For de", "doc_type":"usermanual", "kw":"Does DCS for Redis Provide Backend Management Software?,Redis Usage,User Guide", @@ -3534,7 +3558,7 @@ "uri":"dcs-faq-0730034.html", "node_id":"dcs-faq-0730034.xml", "product_code":"dcs", - "code":"172", + "code":"173", "des":"If a DCS instance is automatically deleted or manually deleted through the Redis client, its data cannot be retrieved. If you have backed up the instance, you can restore", "doc_type":"usermanual", "kw":"Can I Recover Data from Deleted DCS Instances?,Redis Usage,User Guide", @@ -3555,7 +3579,7 @@ "uri":"dcs-faq-210223001.html", "node_id":"dcs-faq-210223001.xml", "product_code":"dcs", - "code":"173", + "code":"174", "des":"Symptom: \"Error in execution; nested exception is io.lettuce.core.RedisCommandExecutionException: OOM command not allowed when used memory > 'maxmemory'\" is returned duri", "doc_type":"usermanual", "kw":"Why Is \"Error in execution\" Returned When I Access Redis?,Redis Usage,User Guide", @@ -3576,7 +3600,7 @@ "uri":"dcs-faq-210409001.html", "node_id":"dcs-faq-210409001.xml", "product_code":"dcs", - "code":"174", + "code":"175", "des":"Normally, Redis keys do not disappear. If a key is missing, it may have expired, been evicted, or been deleted.Perform the following checks one by one:Check whether the k", "doc_type":"usermanual", "kw":"Why Does a Key Disappear in Redis?,Redis Usage,User Guide", @@ -3593,11 +3617,32 @@ "title":"Why Does a Key Disappear in Redis?", "githuburl":"" }, + { + "uri":"dcs-faq-210804001.html", + "node_id":"dcs-faq-210804001.xml", + "product_code":"dcs", + "code":"176", + "des":"Note the following constraints when you consider implementing multi-DB:Usage constraints:The SWAPDB command does not support multi-DB.The INFO KEYSPACE command does not r", + "doc_type":"usermanual", + "kw":"Notes and Procedure for Enabling Multi-DB for Proxy Cluster Instances,Redis Usage,User Guide", + "search_title":"", + "metedata":[ + { + "prodname":"dcs", + "opensource":"true", + "documenttype":"usermanual", + "IsMulti":"Yes", + "IsBot":"Yes" + } + ], + "title":"Notes and Procedure for Enabling Multi-DB for Proxy Cluster Instances", + "githuburl":"" + }, { "uri":"dcs-faq-211228001.html", "node_id":"dcs-faq-211228001.xml", "product_code":"dcs", - "code":"175", + "code":"177", "des":"Multi-key operations, such as those using the MSET command or Lua scripts, are atomic. All specified keys are executed at the same time. However, in a cluster, each key i", "doc_type":"usermanual", "kw":"Explaining and Using Hash Tags,Redis Usage,User Guide", @@ -3618,7 +3663,7 @@ "uri":"dcs-faq-0220330.html", "node_id":"dcs-faq-0220330.xml", "product_code":"dcs", - "code":"176", + "code":"178", "des":"After a single-node DCS instance is restarted, data in the instance is deleted.Master/Standby, read/write splitting, and cluster instances (except single-replica clusters", "doc_type":"usermanual", "kw":"Will Cached Data Be Retained After an Instance Is Restarted?,Redis Usage,User Guide", @@ -3635,11 +3680,32 @@ "title":"Will Cached Data Be Retained After an Instance Is Restarted?", "githuburl":"" }, + { + "uri":"dcs-faq-020220331.html", + "node_id":"dcs-faq-020220331.xml", + "product_code":"dcs", + "code":"179", + "des":"When you create a Proxy Cluster instance, there is only one database by default. This section describes how to create a Proxy Cluster instance with multiple databases.Bef", + "doc_type":"usermanual", + "kw":"How Do I Create a Multi-DB Proxy Cluster Instance?,Redis Usage,User Guide", + "search_title":"", + "metedata":[ + { + "prodname":"dcs", + "opensource":"true", + "documenttype":"usermanual", + "IsMulti":"Yes", + "IsBot":"Yes" + } + ], + "title":"How Do I Create a Multi-DB Proxy Cluster Instance?", + "githuburl":"" + }, { "uri":"dcs-faq-190921003.html", "node_id":"dcs-faq-190921003.xml", "product_code":"dcs", - "code":"177", + "code":"180", "des":"HUAWEI CLOUD Help Center presents technical documents to help you quickly get started with HUAWEI CLOUD services. The technical documents include Service Overview, Price Details, Purchase Guide, User Guide, API Reference, Best Practices, FAQs, and Videos.", "doc_type":"usermanual", "kw":"Redis Commands", @@ -3660,7 +3726,7 @@ "uri":"dcs-faq-0730036.html", "node_id":"dcs-faq-0730036.xml", "product_code":"dcs", - "code":"178", + "code":"181", "des":"Exercise caution when clearing data.Redis 3.0Data of a DCS Redis 3.0 instance cannot be cleared on the console, and can only be cleared by the FLUSHDB or FLUSHALL command", "doc_type":"usermanual", "kw":"How Do I Clear Redis Data?,Redis Commands,User Guide", @@ -3681,7 +3747,7 @@ "uri":"dcs-faq-0730039.html", "node_id":"dcs-faq-0730039.xml", "product_code":"dcs", - "code":"179", + "code":"182", "des":"Yes. For more information about Redis command compatibility, see Command Compatibility.", "doc_type":"usermanual", "kw":"Does DCS for Redis Support the INCR and EXPIRE Commands?,Redis Commands,User Guide", @@ -3702,7 +3768,7 @@ "uri":"dcs-faq-0730040.html", "node_id":"dcs-faq-0730040.xml", "product_code":"dcs", - "code":"180", + "code":"183", "des":"Possible causes include the following:The command is incorrect.As shown in the following figure, the error message is returned because the correct command for deleting a ", "doc_type":"usermanual", "kw":"Why Do I Fail to Execute Some Redis Commands?,Redis Commands,User Guide", @@ -3723,7 +3789,7 @@ "uri":"dcs-faq-0730041.html", "node_id":"dcs-faq-0730041.xml", "product_code":"dcs", - "code":"181", + "code":"184", "des":"Run the command in redis-cli to check whether the command takes effect.The following describes two scenarios:Scenario 1: Set and query the value of a key to check whether", "doc_type":"usermanual", "kw":"Why Does a Redis Command Fail to Take Effect?,Redis Commands,User Guide", @@ -3744,7 +3810,7 @@ "uri":"dcs-faq-0427057.html", "node_id":"dcs-faq-0427057.xml", "product_code":"dcs", - "code":"182", + "code":"185", "des":"Redis timeouts happen on the client or server.Timeouts on the client are managed in the client code. Services can determine an appropriate timeout. For example, parameter", "doc_type":"usermanual", "kw":"Is There a Time Limit on Executing Redis Commands? What Will Happen If a Command Times Out?,Redis Co", @@ -3765,7 +3831,7 @@ "uri":"dcs-faq-0427058.html", "node_id":"dcs-faq-0427058.xml", "product_code":"dcs", - "code":"183", + "code":"186", "des":"No. Like in open-source Redis, keys in DCS for Redis are case-sensitive and cannot be configured to be case-insensitive.", "doc_type":"usermanual", "kw":"Can I Configure Redis Keys to Be Case-Insensitive?,Redis Commands,User Guide", @@ -3786,7 +3852,7 @@ "uri":"dcs-faq-0624001.html", "node_id":"dcs-faq-0624001.xml", "product_code":"dcs", - "code":"184", + "code":"187", "des":"No. Redis does not record commands and does not support viewing the most frequently used commands.", "doc_type":"usermanual", "kw":"Can I View the Most Frequently Used Redis Commands?,Redis Commands,User Guide", @@ -3807,7 +3873,7 @@ "uri":"dcs-faq-0326022.html", "node_id":"dcs-faq-0326022.xml", "product_code":"dcs", - "code":"185", + "code":"188", "des":"HUAWEI CLOUD Help Center presents technical documents to help you quickly get started with HUAWEI CLOUD services. The technical documents include Service Overview, Price Details, Purchase Guide, User Guide, API Reference, Best Practices, FAQs, and Videos.", "doc_type":"usermanual", "kw":"Instance Scaling and Upgrade", @@ -3828,10 +3894,10 @@ "uri":"dcs-faq-0730043.html", "node_id":"dcs-faq-0730043.xml", "product_code":"dcs", - "code":"186", - "des":"No. Different Redis versions use different underlying architectures. The Redis version used by a DCS instance cannot be changed once the instance is created. For example,", + "code":"189", + "des":"No. It is unavailable. Different Redis versions use different underlying architectures. The Redis version used by a DCS instance cannot be changed once the instance is cr", "doc_type":"usermanual", - "kw":"Can DCS Redis Instances Be Upgraded, for Example, from Redis 4.0 to 5.0?,Instance Scaling and Upgrad", + "kw":"Can the Major Version of a DCS Redis Instance Be Upgraded, for Example, from Redis 4.0 to 5.0?,Insta", "search_title":"", "metedata":[ { @@ -3842,14 +3908,14 @@ "IsBot":"Yes" } ], - "title":"Can DCS Redis Instances Be Upgraded, for Example, from Redis 4.0 to 5.0?", + "title":"Can the Major Version of a DCS Redis Instance Be Upgraded, for Example, from Redis 4.0 to 5.0?", "githuburl":"" }, { "uri":"dcs-faq-0730044.html", "node_id":"dcs-faq-0730044.xml", "product_code":"dcs", - "code":"187", + "code":"190", "des":"O&M personnel will contact you before performing maintenance during the maintenance time window, informing you of the operations and their impacts. You do not need to wor", "doc_type":"usermanual", "kw":"Are Services Interrupted If Maintenance is Performed During the Maintenance Time Window?,Instance Sc", @@ -3870,7 +3936,7 @@ "uri":"dcs-faq-0730045.html", "node_id":"dcs-faq-0730045.xml", "product_code":"dcs", - "code":"188", + "code":"191", "des":"No. Specification modifications can take place while the instance is running and do not affect any other resources.", "doc_type":"usermanual", "kw":"Are Instances Stopped or Restarted During Specification Modification?,Instance Scaling and Upgrade,U", @@ -3891,7 +3957,7 @@ "uri":"dcs-faq-0730047.html", "node_id":"dcs-faq-0730047.xml", "product_code":"dcs", - "code":"189", + "code":"192", "des":"You are advised to change the instance specifications during off-peak hours because specification modification has the following impacts:The following table lists scaling", "doc_type":"usermanual", "kw":"Are Services Interrupted During Specification Modification?,Instance Scaling and Upgrade,User Guide", @@ -3912,7 +3978,7 @@ "uri":"dcs-faq-0730048.html", "node_id":"dcs-faq-0730048.xml", "product_code":"dcs", - "code":"190", + "code":"193", "des":"Check whether other tasks are running.Specifications of a DCS instance cannot be modified if another task of the instance is still running. For example, you cannot delete", "doc_type":"usermanual", "kw":"Why Can't I Modify Specifications for a DCS Redis Instance?,Instance Scaling and Upgrade,User Guide", @@ -3933,7 +3999,7 @@ "uri":"dcs-faq-0326023.html", "node_id":"dcs-faq-0326023.xml", "product_code":"dcs", - "code":"191", + "code":"194", "des":"HUAWEI CLOUD Help Center presents technical documents to help you quickly get started with HUAWEI CLOUD services. The technical documents include Service Overview, Price Details, Purchase Guide, User Guide, API Reference, Best Practices, FAQs, and Videos.", "doc_type":"usermanual", "kw":"Monitoring and Alarm", @@ -3954,7 +4020,7 @@ "uri":"dcs-faq-0427070.html", "node_id":"dcs-faq-0427070.xml", "product_code":"dcs", - "code":"192", + "code":"195", "des":"The number of connections received by a DCS instance is a metric that is monitored by Cloud Eye. For details on how to view metrics, see Viewing DCS Monitoring Metrics.On", "doc_type":"usermanual", "kw":"How Do I View Current Concurrent Connections and Maximum Connections of a DCS Redis Instance?,Monito", @@ -3975,7 +4041,7 @@ "uri":"dcs-faq-0730049.html", "node_id":"dcs-faq-0730049.xml", "product_code":"dcs", - "code":"193", + "code":"196", "des":"No. To ensure high-performance reads and writes, Redis does not audit commands. Commands are not printed.", "doc_type":"usermanual", "kw":"Does Redis Support Command Audits?,Monitoring and Alarm,User Guide", @@ -3996,7 +4062,7 @@ "uri":"dcs-faq-0730050.html", "node_id":"dcs-faq-0730050.xml", "product_code":"dcs", - "code":"194", + "code":"197", "des":"If you have any doubt on the monitoring data of a DCS Redis instance, you can access the instance through redis-cli and run the INFO ALL command to view the metrics. For ", "doc_type":"usermanual", "kw":"What Should I Do If the Monitoring Data of a DCS Redis Instance Is Abnormal?,Monitoring and Alarm,Us", @@ -4017,7 +4083,7 @@ "uri":"dcs-faq-0730052.html", "node_id":"dcs-faq-0730052.xml", "product_code":"dcs", - "code":"195", + "code":"198", "des":"For single-node and master/standby DCS instances, the used instance memory is measured by the Redis-server process. For cluster DCS instances, the used cluster memory is ", "doc_type":"usermanual", "kw":"used instance memory is normally slightly higher than the available instance memory,Why Is Used Memo", @@ -4038,7 +4104,7 @@ "uri":"dcs-faq-0513001.html", "node_id":"dcs-faq-0513001.xml", "product_code":"dcs", - "code":"196", + "code":"199", "des":"The basic information about the bandwidth usage metric is as follows.Bandwidth usage = (Input flow + Output flow)/(2 x Maximum bandwidth) x 100%According to the formula, ", "doc_type":"usermanual", "kw":"Why Does Bandwidth Usage Exceed 100%?,Monitoring and Alarm,User Guide", @@ -4059,7 +4125,7 @@ "uri":"dcs-faq-0603001.html", "node_id":"dcs-faq-0603001.xml", "product_code":"dcs", - "code":"197", + "code":"200", "des":"If the Rejected Connections metric is displayed, check if the number of connected clients exceeds the maximum allowed number of connections of the instances.The Rejected ", "doc_type":"usermanual", "kw":"Why Is the Rejected Connections Metric Displayed?,Monitoring and Alarm,User Guide", @@ -4080,7 +4146,7 @@ "uri":"dcs-faq-0220721.html", "node_id":"dcs-faq-0220721.xml", "product_code":"dcs", - "code":"198", + "code":"201", "des":"Flow control is triggered when the traffic used by a Redis instance in a period exceeds the maximum bandwidth.For details about the maximum bandwidth of an instance flavo", "doc_type":"usermanual", "kw":"Why Is Flow Control Triggered? How Do I Handle It?,Monitoring and Alarm,User Guide", @@ -4101,7 +4167,7 @@ "uri":"dcs-faq-0326024.html", "node_id":"dcs-faq-0326024.xml", "product_code":"dcs", - "code":"199", + "code":"202", "des":"HUAWEI CLOUD Help Center presents technical documents to help you quickly get started with HUAWEI CLOUD services. The technical documents include Service Overview, Price Details, Purchase Guide, User Guide, API Reference, Best Practices, FAQs, and Videos.", "doc_type":"usermanual", "kw":"Data Backup, Export, and Migration", @@ -4122,7 +4188,7 @@ "uri":"dcs-faq-0730053.html", "node_id":"dcs-faq-0730053.xml", "product_code":"dcs", - "code":"200", + "code":"203", "des":"For master/standby or cluster instances:Perform the following operations to export the data:On the Backups & Restorations page, view the backup records.If there are no ba", "doc_type":"usermanual", "kw":"How Do I Export DCS Redis Instance Data?,Data Backup, Export, and Migration,User Guide", @@ -4143,7 +4209,7 @@ "uri":"dcs-faq-0730054.html", "node_id":"dcs-faq-0730054.xml", "product_code":"dcs", - "code":"201", + "code":"204", "des":"Redis 3.0No. On the console, backup data of a DCS Redis 3.0 instance can be exported only to AOF files. To export data to RDB files, run the following command in redis-cl", "doc_type":"usermanual", "kw":"Can I Export Backup Data of DCS Redis Instances to RDB Files Using the Console?,Data Backup, Export,", @@ -4164,7 +4230,7 @@ "uri":"dcs-faq-0427081.html", "node_id":"dcs-faq-0427081.xml", "product_code":"dcs", - "code":"202", + "code":"205", "des":"Single-node: NoMaster/Standby, read/write splitting, and cluster (except single-replica clusters): YesDCS Redis instances supports only AOF persistence by default. You ca", "doc_type":"usermanual", "kw":"Do DCS Redis Instances Support Data Persistence? What Is the Impact of Persistence?,Data Backup, Exp", @@ -4185,7 +4251,7 @@ "uri":"dcs-faq-210706001.html", "node_id":"dcs-faq-210706001.xml", "product_code":"dcs", - "code":"203", + "code":"206", "des":"AOF rewrites involve the following concepts:Rewrite window, which is currently 01:00 to 04:59Disk usage threshold, which is 50%Dataset memory, which is the percentage of ", "doc_type":"usermanual", "kw":"When Will AOF Rewrites Be Triggered?,Data Backup, Export, and Migration,User Guide", @@ -4206,7 +4272,7 @@ "uri":"dcs-faq-220317.html", "node_id":"dcs-faq-220317.xml", "product_code":"dcs", - "code":"204", + "code":"207", "des":"No. A migration task allows data to be migrated to only one target instance. To migrate data to multiple target instances, create multiple migration tasks.", "doc_type":"usermanual", "kw":"Can I Migrate Data to Multiple Target Instances in One Migration Task?,Data Backup, Export, and Migr", @@ -4227,7 +4293,7 @@ "uri":"dcs-faq-210721001.html", "node_id":"dcs-faq-210721001.xml", "product_code":"dcs", - "code":"205", + "code":"208", "des":"Migration within DCS:If the online migration task uses the same account and region as the source instance, select a DCS instance (cloud Redis) as the source. The SYNC and", "doc_type":"usermanual", "kw":"How Do I Enable the SYNC and PSYNC Commands?,Data Backup, Export, and Migration,User Guide", @@ -4248,7 +4314,7 @@ "uri":"dcs-faq-11185.html", "node_id":"dcs-faq-11185.xml", "product_code":"dcs", - "code":"206", + "code":"209", "des":"If the data exists on both the source and target instances, the target data is overwritten by the source data. If the data exists only on the target instance, the data wi", "doc_type":"usermanual", "kw":"Will the Same Keys Be Overwritten During Data Migration or Backup Import?,Data Backup, Export, and M", @@ -4269,7 +4335,7 @@ "uri":"dcs-migration-090626001.html", "node_id":"dcs-migration-090626001.xml", "product_code":"dcs", - "code":"207", + "code":"210", "des":"Rump is an open-source tool designed for migrating Redis data online. It supports migration between DBs of the same instance and between DBs of different instances.Rump u", "doc_type":"usermanual", "kw":"Online Migration with Rump,Data Backup, Export, and Migration,User Guide", @@ -4290,7 +4356,7 @@ "uri":"dcs-migration-0312016.html", "node_id":"dcs-migration-0312016.xml", "product_code":"dcs", - "code":"208", + "code":"211", "des":"Convert the format of a data file before importing the file.Run the following command to convert the format of a file in the Windows OS to that in the Unix-like OS:dos2un", "doc_type":"usermanual", "kw":"What Should I Consider When Transferring or Operating Data Between Different OSs?,Data Backup, Expor", @@ -4311,7 +4377,7 @@ "uri":"dcs-migration-0312017.html", "node_id":"dcs-migration-0312017.xml", "product_code":"dcs", - "code":"209", + "code":"212", "des":"A total of 256 DBs (DB 0 to DB 255) can be configured for a single-node, read/write splitting, or master/standby DCS instance.If the target is a cluster instance (a clust", "doc_type":"usermanual", "kw":"Can I Migrate Data from a Multi-DB Source Redis Instance to a Cluster DCS Redis Instance?,Data Backu", @@ -4332,7 +4398,7 @@ "uri":"dcs-migration-0312018.html", "node_id":"dcs-migration-0312018.xml", "product_code":"dcs", - "code":"210", + "code":"213", "des":"The online migration function provided on the console does not support migration of specified DBs. If you want to migrate specified Redis DBs, use redis-shake to export o", "doc_type":"usermanual", "kw":"How Can I Migrate Partial Data?,Data Backup, Export, and Migration,User Guide", @@ -4353,7 +4419,7 @@ "uri":"dcs-migration-0312019.html", "node_id":"dcs-migration-0312019.xml", "product_code":"dcs", - "code":"211", + "code":"214", "des":"Proxy Cluster instancesProxy Cluster instances are used in the same way that you use single-node or master/standby instances. However, only one DB is configured for a Pro", "doc_type":"usermanual", "kw":"What Are the Constraints and Precautions for Migrating Redis Data to a Cluster Instance?,Data Backup", @@ -4374,7 +4440,7 @@ "uri":"dcs-migration-0312020.html", "node_id":"dcs-migration-0312020.xml", "product_code":"dcs", - "code":"212", + "code":"215", "des":"NetworkBefore online migration, ensure that the network configured for the migration task is connected to source and target Redis instances.Before online migration, ensur", "doc_type":"usermanual", "kw":"What Should I Consider for Online Migration?,Data Backup, Export, and Migration,User Guide", @@ -4395,7 +4461,7 @@ "uri":"dcs-migration-0312021.html", "node_id":"dcs-migration-0312021.xml", "product_code":"dcs", - "code":"213", + "code":"216", "des":"Yes. You can use the application dual-write mode. In this mode, during data migration, data is still read from the source Redis instance, and operations such as adding, d", "doc_type":"usermanual", "kw":"Can I Perform Online Migration Without Any Service Interruption?,Data Backup, Export, and Migration,", @@ -4416,7 +4482,7 @@ "uri":"dcs-migration-211125001.html", "node_id":"dcs-migration-211125001.xml", "product_code":"dcs", - "code":"214", + "code":"217", "des":"The following error messages may be displayed during online migration:\"Disconnecting timedout slave\" is reported on the source instance, as shown in the following figure:", "doc_type":"usermanual", "kw":"What If \"Disconnecting timedout slave\" and \"overcoming of output buffer limits\" Are Reported on the ", @@ -4437,7 +4503,7 @@ "uri":"dcs-faq-0427076.html", "node_id":"dcs-faq-0427076.xml", "product_code":"dcs", - "code":"215", + "code":"218", "des":"For details on how to use Rump, see the Data Migration Guide.Possible causes:Rump does not support migration to cluster DCS instances.Commands are incorrectly run in Rump", "doc_type":"usermanual", "kw":"Why Is Memory of a DCS Redis Instance Unchanged After Data Migration Using Rump, Even If No Error Me", @@ -4458,7 +4524,7 @@ "uri":"dcs-migration-0715005.html", "node_id":"dcs-migration-0715005.xml", "product_code":"dcs", - "code":"216", + "code":"219", "des":"Yes. Redis is backward compatible.The version of the source Redis (DCS, self-built, or another cloud) can be earlier than or the same as the target DCS instance.", "doc_type":"usermanual", "kw":"Can I Migrate Data from a Lower Redis Version to a Higher One?,Data Backup, Export, and Migration,Us", @@ -4479,7 +4545,7 @@ "uri":"dcs-faq-0805001.html", "node_id":"dcs-faq-0805001.xml", "product_code":"dcs", - "code":"217", + "code":"220", "des":"HUAWEI CLOUD Help Center presents technical documents to help you quickly get started with HUAWEI CLOUD services. The technical documents include Service Overview, Price Details, Purchase Guide, User Guide, API Reference, Best Practices, FAQs, and Videos.", "doc_type":"usermanual", "kw":"Big/Hot Key Analysis and Expired Key Scan", @@ -4500,7 +4566,7 @@ "uri":"dcs-faq-0521003.html", "node_id":"dcs-faq-0521003.xml", "product_code":"dcs", - "code":"218", + "code":"221", "des":"HUAWEI CLOUD Help Center presents technical documents to help you quickly get started with HUAWEI CLOUD services. The technical documents include Service Overview, Price Details, Purchase Guide, User Guide, API Reference, Best Practices, FAQs, and Videos.", "doc_type":"usermanual", "kw":"What Are Big Keys and Hot Keys?,Big/Hot Key Analysis and Expired Key Scan,User Guide", @@ -4521,7 +4587,7 @@ "uri":"dcs-faq-0521004.html", "node_id":"dcs-faq-0521004.xml", "product_code":"dcs", - "code":"219", + "code":"222", "des":"HUAWEI CLOUD Help Center presents technical documents to help you quickly get started with HUAWEI CLOUD services. The technical documents include Service Overview, Price Details, Purchase Guide, User Guide, API Reference, Best Practices, FAQs, and Videos.", "doc_type":"usermanual", "kw":"What Is the Impact of Big Keys or Hot Keys?,Big/Hot Key Analysis and Expired Key Scan,User Guide", @@ -4542,7 +4608,7 @@ "uri":"dcs-faq-0521005.html", "node_id":"dcs-faq-0521005.xml", "product_code":"dcs", - "code":"220", + "code":"223", "des":"Keep the size of Strings within 10 KB and the quantity of Hashes, Lists, Sets, or Zsets within 5000.When naming keys, use the service name abbreviation as the prefix and ", "doc_type":"usermanual", "kw":"How Do I Avoid Big Keys and Hot Keys?,Big/Hot Key Analysis and Expired Key Scan,User Guide", @@ -4563,7 +4629,7 @@ "uri":"dcs-faq-0521006.html", "node_id":"dcs-faq-0521006.xml", "product_code":"dcs", - "code":"221", + "code":"224", "des":"DCS for Redis 3.0 does not support hot key analysis on the console. Alternatively, you can use the following methods to analyze hot keys:Method 1: Analyze the service str", "doc_type":"usermanual", "kw":"How Do I Analyze the Hot Keys of a DCS Redis 3.0 Instance?,Big/Hot Key Analysis and Expired Key Scan", @@ -4584,7 +4650,7 @@ "uri":"dcs-faq-0606002.html", "node_id":"dcs-faq-0606002.xml", "product_code":"dcs", - "code":"222", + "code":"225", "des":"Hot key analysis is not supported by DCS Redis 3.0 instances. You can configure alarms to detect hot keys.Configure alarm rules for the Memory Usage metric of the instanc", "doc_type":"usermanual", "kw":"How Do I Detect Big Keys and Hot Keys in Advance?,Big/Hot Key Analysis and Expired Key Scan,User Gui", @@ -4605,7 +4671,7 @@ "uri":"dcs-faq-210531002.html", "node_id":"dcs-faq-210531002.xml", "product_code":"dcs", - "code":"223", + "code":"226", "des":"What are the rules for scheduled deletion of expired keys on a daily basis? Can I customize the rules?Lazy free deletion: The deletion strategy is controlled in the main ", "doc_type":"usermanual", "kw":"How Does DCS Delete Expired Keys?,Big/Hot Key Analysis and Expired Key Scan,User Guide", @@ -4626,7 +4692,7 @@ "uri":"dcs-faq-210812001.html", "node_id":"dcs-faq-210812001.xml", "product_code":"dcs", - "code":"224", + "code":"227", "des":"Key storage durationKeys that do not have an expiration are stored permanently.Keys that have an expiration are deleted after they expire. For details, see Scanning Expir", "doc_type":"usermanual", "kw":"How Long Are Keys Stored? How Do I Set Key Expiration?,Big/Hot Key Analysis and Expired Key Scan,Use", @@ -4647,7 +4713,7 @@ "uri":"dcs-faq-191204001.html", "node_id":"dcs-faq-191204001.xml", "product_code":"dcs", - "code":"225", + "code":"228", "des":"HUAWEI CLOUD Help Center presents technical documents to help you quickly get started with HUAWEI CLOUD services. The technical documents include Service Overview, Price Details, Purchase Guide, User Guide, API Reference, Best Practices, FAQs, and Videos.", "doc_type":"usermanual", "kw":"Master/Standby Switchover", @@ -4668,7 +4734,7 @@ "uri":"dcs-faq-0730058.html", "node_id":"dcs-faq-0730058.xml", "product_code":"dcs", - "code":"226", + "code":"229", "des":"A master/standby switchover may occur in the following scenarios:A master/standby switchover operation is initiated on the DCS Console.If the master node of a master/stan", "doc_type":"usermanual", "kw":"When Does a Master/Standby Switchover Occur?,Master/Standby Switchover,User Guide", @@ -4689,7 +4755,7 @@ "uri":"dcs-faq-0730059.html", "node_id":"dcs-faq-0730059.xml", "product_code":"dcs", - "code":"227", + "code":"230", "des":"If a fault occurs in a master/standby or cluster DCS instance, a failover is triggered automatically. Services may be interrupted for less than half a minute during excep", "doc_type":"usermanual", "kw":"How Does Master/Standby Switchover Affect Services?,Master/Standby Switchover,User Guide", @@ -4710,7 +4776,7 @@ "uri":"dcs-faq-0730060.html", "node_id":"dcs-faq-0730060.xml", "product_code":"dcs", - "code":"228", + "code":"231", "des":"No. If the master fails, the standby node will be promoted to master and takes the original IP address.", "doc_type":"usermanual", "kw":"Does the Client Need to Switch the Connection Address After a Master/Standby Switchover?,Master/Stan", @@ -4731,7 +4797,7 @@ "uri":"dcs-faq-0730061.html", "node_id":"dcs-faq-0730061.xml", "product_code":"dcs", - "code":"229", + "code":"232", "des":"Redis master/standby instances are also called master/slave instances. Generally, updates to the master cache node are automatically and asynchronously replicated to the ", "doc_type":"usermanual", "kw":"asynchronously replicated,How Does Redis Master/Standby Replication Work?,Master/Standby Switchover,", @@ -4752,7 +4818,7 @@ "uri":"en-us_topic_0072429345.html", "node_id":"en-us_topic_0072429345.xml", "product_code":"dcs", - "code":"230", + "code":"233", "des":"For details about the terms involved in this document, see Glossary.", "doc_type":"usermanual", "kw":"Glossary,User Guide", @@ -4773,7 +4839,7 @@ "uri":"dcs-ug-0326026.html", "node_id":"dcs-ug-0326026.xml", "product_code":"dcs", - "code":"231", + "code":"234", "des":"HUAWEI CLOUD Help Center presents technical documents to help you quickly get started with HUAWEI CLOUD services. The technical documents include Service Overview, Price Details, Purchase Guide, User Guide, API Reference, Best Practices, FAQs, and Videos.", "doc_type":"usermanual", "kw":"Change History,User Guide", diff --git a/docs/dcs/umn/CLASS.TXT.json b/docs/dcs/umn/CLASS.TXT.json index 44556be28..f6bea2900 100644 --- a/docs/dcs/umn/CLASS.TXT.json +++ b/docs/dcs/umn/CLASS.TXT.json @@ -36,7 +36,7 @@ "code":"4" }, { - "desc":"A single-node DCS Redis instance has only one node and does not support data persistence. They are suitable for cache services that do not require data reliability.You ca", + "desc":"A single-node DCS Redis instance has only one node and does not support data persistence. They are suitable for cache services that do not require data reliability.The ma", "product_code":"dcs", "title":"Single-Node Redis", "uri":"CacheSingleNode.html", @@ -45,7 +45,7 @@ "code":"5" }, { - "desc":"This section describes master/standby DCS Redis instances.You cannot upgrade the Redis version for an instance. For example, a master/standby DCS Redis 4.0 instance canno", + "desc":"This section describes master/standby DCS Redis instances.The major version cannot be upgraded. For example, a master/standby DCS Redis 4.0 instance cannot be upgraded to", "product_code":"dcs", "title":"Master/Standby Redis", "uri":"CacheMasterSlave.html", @@ -549,7 +549,7 @@ "code":"61" }, { - "desc":"On the DCS console, you can delete one or multiple DCS instances at a time. You can also delete all instance creation tasks that have failed to run.After a DCS instance i", + "desc":"On the DCS console, you can delete one or multiple DCS instances at a time. You can also delete all instance creation tasks that have failed to run.DCS instances already ", "product_code":"dcs", "title":"Deleting DCS Instances", "uri":"dcs-ug-0326014.html", @@ -593,6 +593,15 @@ "p_code":"58", "code":"66" }, + { + "desc":"DCS optimizes functions and fixes vulnerabilities in minor and proxy upgrades. This section describes how to upgrade the minor or proxy version of an instance.Upgrading t", + "product_code":"dcs", + "title":"Upgrading the Minor or Proxy Version of a DCS Instance", + "uri":"dcs_03_0016.html", + "doc_type":"usermanual", + "p_code":"58", + "code":"67" + }, { "desc":"HUAWEI CLOUD Help Center presents technical documents to help you quickly get started with HUAWEI CLOUD services. The technical documents include Service Overview, Price Details, Purchase Guide, User Guide, API Reference, Best Practices, FAQs, and Videos.", "product_code":"dcs", @@ -600,7 +609,7 @@ "uri":"dcs-ug-0312022.html", "doc_type":"usermanual", "p_code":"", - "code":"67" + "code":"68" }, { "desc":"In most cases, different DCS instance management operations cannot proceed concurrently. If you initiate a new management operation while the current operation is in prog", @@ -608,8 +617,8 @@ "title":"Configuration Notice", "uri":"dcs-ug-0312023.html", "doc_type":"usermanual", - "p_code":"67", - "code":"68" + "p_code":"68", + "code":"69" }, { "desc":"You can modify the configuration parameters of your DCS instance to optimize DCS performance based on your requirements.For example, if you do not need data persistence, ", @@ -617,8 +626,8 @@ "title":"Modifying Configuration Parameters", "uri":"dcs-ug-0312024.html", "doc_type":"usermanual", - "p_code":"67", - "code":"69" + "p_code":"68", + "code":"70" }, { "desc":"On the DCS console, after creating a DCS instance, you can modify the maintenance time window of the DCS instance on the instance's Basic Information page.At least one DC", @@ -626,8 +635,8 @@ "title":"Modifying Maintenance Time Window", "uri":"dcs-ug-0312025.html", "doc_type":"usermanual", - "p_code":"67", - "code":"70" + "p_code":"68", + "code":"71" }, { "desc":"On the DCS console, after creating a DCS instance, you can modify the security group of the DCS instance on the instance's Basic Information page.You can modify the secur", @@ -635,8 +644,8 @@ "title":"Modifying the Security Group", "uri":"dcs-ug-0312026.html", "doc_type":"usermanual", - "p_code":"67", - "code":"71" + "p_code":"68", + "code":"72" }, { "desc":"After you initiate certain instance operations such as modifying instance specifications and changing or resetting a password, a background task will start for the operat", @@ -644,8 +653,8 @@ "title":"Viewing Background Tasks", "uri":"dcs-ug-0312028.html", "doc_type":"usermanual", - "p_code":"67", - "code":"72" + "p_code":"68", + "code":"73" }, { "desc":"Tags facilitate DCS instance identification and management.You can add tags to an instance when creating it or add, modify, or delete tags on the details page of a create", @@ -653,8 +662,8 @@ "title":"Managing Tags", "uri":"TagManagement.html", "doc_type":"usermanual", - "p_code":"67", - "code":"73" + "p_code":"68", + "code":"74" }, { "desc":"This section describes how to query the shards and replicas of a DCS Redis 4.0 or later instance and how to manually promote a replica to master.Currently, this function ", @@ -662,8 +671,8 @@ "title":"Managing Shards and Replicas", "uri":"dcs-ug-210107001.html", "doc_type":"usermanual", - "p_code":"67", - "code":"74" + "p_code":"68", + "code":"75" }, { "desc":"By performing big key analysis and hot key analysis, you will have a picture of keys that occupy a large space and keys that are the most frequently accessed.Notes on big", @@ -671,8 +680,8 @@ "title":"Analyzing Big Keys and Hot Keys", "uri":"dcs-ug-190808001.html", "doc_type":"usermanual", - "p_code":"67", - "code":"75" + "p_code":"68", + "code":"76" }, { "desc":"There are two ways to delete a key in Redis.Use the DEL command to directly delete a key.Use commands such as EXPIRE to set a timeout on a key. After the timeout elapses,", @@ -680,8 +689,8 @@ "title":"Scanning and Deleting Expired Keys in a DCS Redis Instance", "uri":"dcs-ug-210330002.html", "doc_type":"usermanual", - "p_code":"67", - "code":"76" + "p_code":"68", + "code":"77" }, { "desc":"DCS helps you control access to your DCS instances in the following ways, depending on the deployment mode:To control access to DCS Redis 3.0 instances, you can use secur", @@ -689,8 +698,8 @@ "title":"Managing IP Address Whitelist", "uri":"dcs-ug-190812001.html", "doc_type":"usermanual", - "p_code":"67", - "code":"77" + "p_code":"68", + "code":"78" }, { "desc":"Redis logs queries that exceed a specified execution time. You can view the slow query log on the DCS console to identify performance issues.For details about the command", @@ -698,8 +707,8 @@ "title":"Viewing Redis Slow Queries", "uri":"dcs-ug-190926001.html", "doc_type":"usermanual", - "p_code":"67", - "code":"78" + "p_code":"68", + "code":"79" }, { "desc":"You can create run log files on the DCS console to collect run logs of DCS Redis instances within a specified period. After the logs are collected, you can download the l", @@ -707,17 +716,17 @@ "title":"Viewing Redis Run Logs", "uri":"dcs-ug-1009001.html", "doc_type":"usermanual", - "p_code":"67", - "code":"79" + "p_code":"68", + "code":"80" }, { - "desc":"If a fault or performance issue occurs, you can ask DCS to diagnose your instance to learn about the cause and impact of the issue and how to handle it.Tested Object: You", + "desc":"If a fault or performance issue occurs, you can ask DCS to diagnose your instance to learn about the cause and impact of the issue and how to handle it.Available for DCS ", "product_code":"dcs", "title":"Diagnosing an Instance", "uri":"dcs-ug-210818001.html", "doc_type":"usermanual", - "p_code":"67", - "code":"80" + "p_code":"68", + "code":"81" }, { "desc":"Single-node, master/standby, and Redis ClusterDCS Redis 6.0/7.0instances support SSL encryption to ensure data transmission security. This function is not available for o", @@ -725,8 +734,8 @@ "title":"Transmitting DCS Redis Data with Encryption Using SSL", "uri":"dcs-ug-023129.html", "doc_type":"usermanual", - "p_code":"67", - "code":"81" + "p_code":"68", + "code":"82" }, { "desc":"You can view the client connection information of an instance and disconnect clients.This function is supported by DCS Redis 4.0 instances and later.The session managemen", @@ -734,8 +743,8 @@ "title":"Managing Sessions", "uri":"dcs-ug-22121.html", "doc_type":"usermanual", - "p_code":"67", - "code":"82" + "p_code":"68", + "code":"83" }, { "desc":"You can create read-only and read/write users to control access permissions.This function is supported only by DCS Redis 4.0 and 5.0 instances.Default user: defaultA maxi", @@ -743,17 +752,17 @@ "title":"Managing Users", "uri":"dcs-ug-221220.html", "doc_type":"usermanual", - "p_code":"67", - "code":"83" + "p_code":"68", + "code":"84" }, { "desc":"HUAWEI CLOUD Help Center presents technical documents to help you quickly get started with HUAWEI CLOUD services. The technical documents include Service Overview, Price Details, Purchase Guide, User Guide, API Reference, Best Practices, FAQs, and Videos.", "product_code":"dcs", - "title":"Backing Up and Restoring DCS Instances", + "title":"Backing Up and Restoring Instance Data", "uri":"dcs-ug-0312030.html", "doc_type":"usermanual", "p_code":"", - "code":"84" + "code":"85" }, { "desc":"On the DCS console, you can back up and restore DCS instances.There is a small chance that inconsistent data could exist in a DCS instance owing to service system excepti", @@ -761,35 +770,35 @@ "title":"Overview", "uri":"en-us_topic_0079835992.html", "doc_type":"usermanual", - "p_code":"84", - "code":"85" + "p_code":"85", + "code":"86" }, { - "desc":"On the DCS console, you can configure an automatic backup policy. The system then backs up data in your instances according to the backup policy.By default, automatic bac", + "desc":"On the DCS console, you can configure an automatic backup policy. The system then regularly backs up data in your instances according to the backup policy.By default, aut", "product_code":"dcs", "title":"Configuring an Automatic Backup Policy", "uri":"dcs-ug-0312031.html", "doc_type":"usermanual", - "p_code":"84", - "code":"86" + "p_code":"85", + "code":"87" }, { - "desc":"You need to manually back up data in DCS instances in a timely manner. This section describes how to manually back up data in master/standby instances using the DCS conso", + "desc":"You need to manually back up data in DCS instances in a timely manner. This section describes how to manually back up data in master/standby instances on the DCS console.", "product_code":"dcs", "title":"Manually Backing Up a DCS Instance", "uri":"dcs-ug-0312032.html", "doc_type":"usermanual", - "p_code":"84", - "code":"87" + "p_code":"85", + "code":"88" }, { - "desc":"On the DCS console, you can restore backup data to a chosen DCS instance.At least one master/standby or cluster DCS instance is in the Running state.A backup task has bee", + "desc":"You can restore backup data to a specific DCS instance.At least one master/standby or cluster DCS instance is in the Running state.A backup task has been run to back up d", "product_code":"dcs", "title":"Restoring a DCS Instance", "uri":"dcs-ug-0312033.html", "doc_type":"usermanual", - "p_code":"84", - "code":"88" + "p_code":"85", + "code":"89" }, { "desc":"Automatically backed up data can be retained for a maximum of 7 days. Manually backed up data is not free of charge and takes space in OBS. Due to these limitations, you ", @@ -797,8 +806,8 @@ "title":"Downloading a Backup File", "uri":"dcs-ug-0312034.html", "doc_type":"usermanual", - "p_code":"84", - "code":"89" + "p_code":"85", + "code":"90" }, { "desc":"HUAWEI CLOUD Help Center presents technical documents to help you quickly get started with HUAWEI CLOUD services. The technical documents include Service Overview, Price Details, Purchase Guide, User Guide, API Reference, Best Practices, FAQs, and Videos.", @@ -807,7 +816,7 @@ "uri":"dcs-ug-0312035.html", "doc_type":"usermanual", "p_code":"", - "code":"90" + "code":"91" }, { "desc":"DCS for Redis supports online migration (in full or incrementally) and backup migration (by importing backup files).Backup migration is suitable when the source and targe", @@ -815,8 +824,8 @@ "title":"Introduction to Migration with DCS", "uri":"dcs-ug-0312036.html", "doc_type":"usermanual", - "p_code":"90", - "code":"91" + "p_code":"91", + "code":"92" }, { "desc":"HUAWEI CLOUD Help Center presents technical documents to help you quickly get started with HUAWEI CLOUD services. The technical documents include Service Overview, Price Details, Purchase Guide, User Guide, API Reference, Best Practices, FAQs, and Videos.", @@ -824,8 +833,8 @@ "title":"Importing Backup Files", "uri":"dcs-ug-210922001.html", "doc_type":"usermanual", - "p_code":"90", - "code":"92" + "p_code":"91", + "code":"93" }, { "desc":"Use the DCS console to migrate backup data to DCS for Redis.Simply download the source Redis backup data and then upload the data to an OBS bucket in the same region as t", @@ -833,8 +842,8 @@ "title":"Importing Backup Files from an OBS Bucket", "uri":"dcs-ug-0312037.html", "doc_type":"usermanual", - "p_code":"92", - "code":"93" + "p_code":"93", + "code":"94" }, { "desc":"Use the DCS console to migrate Redis data from self-hosted Redis to DCS for Redis.Simply back up your Redis data, create a migration task on the DCS console, and then imp", @@ -842,8 +851,8 @@ "title":"Importing Backup Files from Redis", "uri":"dcs-ug-210226001.html", "doc_type":"usermanual", - "p_code":"92", - "code":"94" + "p_code":"93", + "code":"95" }, { "desc":"If the source and target instances are interconnected and the SYNC and PSYNC commands are supported in the source instance, data can be migrated online in full or increme", @@ -851,8 +860,8 @@ "title":"Migrating Data Online", "uri":"dcs-ug-0312038.html", "doc_type":"usermanual", - "p_code":"90", - "code":"95" + "p_code":"91", + "code":"96" }, { "desc":"Currently, you cannot change the instance type when using the specification modification function. To modify instance specifications while changing the instance type, you", @@ -860,8 +869,8 @@ "title":"Switching DCS Instance IP Addresses", "uri":"dcs-ug-210820001.html", "doc_type":"usermanual", - "p_code":"90", - "code":"96" + "p_code":"91", + "code":"97" }, { "desc":"HUAWEI CLOUD Help Center presents technical documents to help you quickly get started with HUAWEI CLOUD services. The technical documents include Service Overview, Price Details, Purchase Guide, User Guide, API Reference, Best Practices, FAQs, and Videos.", @@ -870,7 +879,7 @@ "uri":"dcs-ug-0312039.html", "doc_type":"usermanual", "p_code":"", - "code":"97" + "code":"98" }, { "desc":"Passwords can be configured to control access to your DCS instances, ensuring the security of your data.After 5 consecutive incorrect password attempts, the account for a", @@ -878,8 +887,8 @@ "title":"DCS Instance Passwords", "uri":"cache-instance-password.html", "doc_type":"usermanual", - "p_code":"97", - "code":"98" + "p_code":"98", + "code":"99" }, { "desc":"On the DCS console, you can change the password required for accessing your DCS instance.You cannot change the password of a DCS instance in password-free mode.The DCS in", @@ -887,8 +896,8 @@ "title":"Changing Instance Passwords", "uri":"dcs-ug-0312040.html", "doc_type":"usermanual", - "p_code":"97", - "code":"99" + "p_code":"98", + "code":"100" }, { "desc":"On the DCS console, you can configure a new password if you forget your instance password.For a DCS Redis instance, you can change it from password mode to password-free ", @@ -896,8 +905,8 @@ "title":"Resetting Instance Passwords", "uri":"dcs-ug-0312041.html", "doc_type":"usermanual", - "p_code":"97", - "code":"100" + "p_code":"98", + "code":"101" }, { "desc":"DCS Redis instances can be accessed with or without passwords. After an instance is created, you can change its password setting in the following scenarios:To access a DC", @@ -905,8 +914,8 @@ "title":"Changing Password Settings for DCS Redis Instances", "uri":"dcs-ug-0312042.html", "doc_type":"usermanual", - "p_code":"97", - "code":"101" + "p_code":"98", + "code":"102" }, { "desc":"HUAWEI CLOUD Help Center presents technical documents to help you quickly get started with HUAWEI CLOUD services. The technical documents include Service Overview, Price Details, Purchase Guide, User Guide, API Reference, Best Practices, FAQs, and Videos.", @@ -915,7 +924,7 @@ "uri":"dcs-ug-210622001.html", "doc_type":"usermanual", "p_code":"", - "code":"102" + "code":"103" }, { "desc":"This section describes how to view parameter templates on the DCS console.Currently, you can enter a keyword in the search box to search for a parameter template by templ", @@ -923,8 +932,8 @@ "title":"Viewing Parameter Templates", "uri":"dcs-ug-210622002.html", "doc_type":"usermanual", - "p_code":"102", - "code":"103" + "p_code":"103", + "code":"104" }, { "desc":"You can create custom parameter templates for different cache engine versions and instance types based on service requirements.If you select Default Templates, click Cust", @@ -932,8 +941,8 @@ "title":"Creating a Custom Parameter Template", "uri":"dcs-ug-210622003.html", "doc_type":"usermanual", - "p_code":"102", - "code":"104" + "p_code":"103", + "code":"105" }, { "desc":"You can modify the name, description, and parameters of a custom parameter template based on service requirements.Click Edit in the Operation column.Change the name or mo", @@ -941,8 +950,8 @@ "title":"Modifying a Custom Parameter Template", "uri":"dcs-ug-210622004.html", "doc_type":"usermanual", - "p_code":"102", - "code":"105" + "p_code":"103", + "code":"106" }, { "desc":"This section describes how to delete a custom parameter template.", @@ -950,8 +959,8 @@ "title":"Deleting a Custom Parameter Template", "uri":"dcs-ug-210622005.html", "doc_type":"usermanual", - "p_code":"102", - "code":"106" + "p_code":"103", + "code":"107" }, { "desc":"HUAWEI CLOUD Help Center presents technical documents to help you quickly get started with HUAWEI CLOUD services. The technical documents include Service Overview, Price Details, Purchase Guide, User Guide, API Reference, Best Practices, FAQs, and Videos.", @@ -960,7 +969,7 @@ "uri":"dcs-ug-0326016.html", "doc_type":"usermanual", "p_code":"", - "code":"107" + "code":"108" }, { "desc":"This section describes DCS metrics reported to Cloud Eye as well as their namespaces and dimensions. You can use the Cloud Eye console or call APIs to query the DCS metri", @@ -968,8 +977,8 @@ "title":"DCS Metrics", "uri":"dcs-ug-0326019.html", "doc_type":"usermanual", - "p_code":"107", - "code":"108" + "p_code":"108", + "code":"109" }, { "desc":"You can view DCS instance metrics on the Performance Monitoring page.You can also click View Metric in the Operation column on the Cache Manager page. You will be redirec", @@ -977,8 +986,8 @@ "title":"Viewing DCS Monitoring Metrics", "uri":"dcs-ug-0312045.html", "doc_type":"usermanual", - "p_code":"107", - "code":"109" + "p_code":"108", + "code":"110" }, { "desc":"This section describes the alarm rules of some metrics and how to configure the rules. In actual scenarios, configure alarm rules for metrics by referring to the followin", @@ -986,8 +995,8 @@ "title":"Configuring Alarm Rules for Critical Metrics", "uri":"dcs-ug-190905001.html", "doc_type":"usermanual", - "p_code":"107", - "code":"110" + "p_code":"108", + "code":"111" }, { "desc":"HUAWEI CLOUD Help Center presents technical documents to help you quickly get started with HUAWEI CLOUD services. The technical documents include Service Overview, Price Details, Purchase Guide, User Guide, API Reference, Best Practices, FAQs, and Videos.", @@ -996,7 +1005,7 @@ "uri":"dcs-ug-0326017.html", "doc_type":"usermanual", "p_code":"", - "code":"111" + "code":"112" }, { "desc":"With CTS, you can query, audit, and review operations performed on cloud resources. Traces include the operation requests sent using the management console or open APIs a", @@ -1004,8 +1013,8 @@ "title":"Operations That Can Be Recorded by CTS", "uri":"dcs-ug-0326018.html", "doc_type":"usermanual", - "p_code":"111", - "code":"112" + "p_code":"112", + "code":"113" }, { "desc":"After CTS is enabled, the tracker starts recording operations on cloud resources. Operation records for the last seven days can be viewed on the CTS console. This section", @@ -1013,8 +1022,8 @@ "title":"Viewing Traces on the CTS Console", "uri":"dcs-ug-0312047.html", "doc_type":"usermanual", - "p_code":"111", - "code":"113" + "p_code":"112", + "code":"114" }, { "desc":"HUAWEI CLOUD Help Center presents technical documents to help you quickly get started with HUAWEI CLOUD services. The technical documents include Service Overview, Price Details, Purchase Guide, User Guide, API Reference, Best Practices, FAQs, and Videos.", @@ -1023,7 +1032,7 @@ "uri":"dcs-migration-230313.html", "doc_type":"usermanual", "p_code":"", - "code":"114" + "code":"115" }, { "desc":"Due to variations of Redis application environments and scenarios, migration solutions must be detailed to address actual requirements. The time required for data migrati", @@ -1031,8 +1040,8 @@ "title":"Overview", "uri":"dcs-migration-0713001.html", "doc_type":"usermanual", - "p_code":"114", - "code":"115" + "p_code":"115", + "code":"116" }, { "desc":"Collect the following information about the cached data to be migrated (based on Information to be collected for the migration):Number of instancesNumber of databases (DB", @@ -1040,8 +1049,8 @@ "title":"Migration Process", "uri":"dcs-migration-0312001.html", "doc_type":"usermanual", - "p_code":"114", - "code":"116" + "p_code":"115", + "code":"117" }, { "desc":"Self-hosted Redis refers to self-hosted Redis on this service, in another cloud, or in on-premises data centers.", @@ -1049,8 +1058,8 @@ "title":"Migration Solution Notes", "uri":"dcs-migration-090626002.html", "doc_type":"usermanual", - "p_code":"114", - "code":"117" + "p_code":"115", + "code":"118" }, { "desc":"HUAWEI CLOUD Help Center presents technical documents to help you quickly get started with HUAWEI CLOUD services. The technical documents include Service Overview, Price Details, Purchase Guide, User Guide, API Reference, Best Practices, FAQs, and Videos.", @@ -1058,8 +1067,8 @@ "title":"Migrating Data from Self-Hosted Redis to DCS", "uri":"dcs-migration-0312002.html", "doc_type":"usermanual", - "p_code":"114", - "code":"118" + "p_code":"115", + "code":"119" }, { "desc":"If the source self-host and target instances are interconnected and the SYNC and PSYNC commands are supported by the source instance, data can be migrated online in full ", @@ -1067,8 +1076,8 @@ "title":"Migrating Self-Built Redis Online", "uri":"dcs-migration-190703003.html", "doc_type":"usermanual", - "p_code":"118", - "code":"119" + "p_code":"119", + "code":"120" }, { "desc":"This section describes how to migrate self-hosted Redis to DCS by importing backup files.Simply download the source Redis data and then upload the data to an OBS bucket i", @@ -1076,8 +1085,8 @@ "title":"Self-Hosted Redis Migration with Backup Files", "uri":"dcs-migration-190703002.html", "doc_type":"usermanual", - "p_code":"118", - "code":"120" + "p_code":"119", + "code":"121" }, { "desc":"redis-cli is the command line tool of Redis, which can be used after you install the Redis server. This section describes how to use redis-cli to migrate a data from a se", @@ -1085,8 +1094,8 @@ "title":"Self-Hosted Redis Migration with redis-cli (AOF)", "uri":"dcs-migration-0312010.html", "doc_type":"usermanual", - "p_code":"118", - "code":"121" + "p_code":"119", + "code":"122" }, { "desc":"redis-cli is the command line tool of Redis, which can be used after you install the Redis server. redis-cli supports data export as an RDB file. If your Redis service do", @@ -1094,8 +1103,8 @@ "title":"Self-Hosted Redis Migration with redis-cli (RDB)", "uri":"dcs-migration-0312011.html", "doc_type":"usermanual", - "p_code":"118", - "code":"122" + "p_code":"119", + "code":"123" }, { "desc":"redis-shake is an open-source tool for migrating data online or offline (by importing backup files) between Redis Clusters. Data can be migrated to DCS Redis Cluster inst", @@ -1103,8 +1112,8 @@ "title":"Self-Hosted Redis Cluster Migration with redis-shake (Online)", "uri":"dcs-migrate-demo02.html", "doc_type":"usermanual", - "p_code":"118", - "code":"123" + "p_code":"119", + "code":"124" }, { "desc":"redis-shake is an open-source tool for migrating data online or offline (by importing backup files) between Redis Clusters. Data can be migrated to DCS Redis Cluster inst", @@ -1112,8 +1121,8 @@ "title":"Self-Hosted Redis Cluster Migration with redis-shake (RDB)", "uri":"dcs-migrate-demo03.html", "doc_type":"usermanual", - "p_code":"118", - "code":"124" + "p_code":"119", + "code":"125" }, { "desc":"HUAWEI CLOUD Help Center presents technical documents to help you quickly get started with HUAWEI CLOUD services. The technical documents include Service Overview, Price Details, Purchase Guide, User Guide, API Reference, Best Practices, FAQs, and Videos.", @@ -1121,8 +1130,8 @@ "title":"Migrating Data Between DCS Instances", "uri":"dcs-migration-0312008.html", "doc_type":"usermanual", - "p_code":"114", - "code":"125" + "p_code":"115", + "code":"126" }, { "desc":"If the source and target instances are interconnected and the SYNC and PSYNC commands are supported by the source instance, data can be migrated online in full or increme", @@ -1130,17 +1139,17 @@ "title":"Online Migration Between Instances", "uri":"dcs-migration-0312003.html", "doc_type":"usermanual", - "p_code":"125", - "code":"126" + "p_code":"126", + "code":"127" }, { - "desc":"You can migrate data between DCS instances by importing backup files.If the source Redis and target Redis are in the same region under the same DCS account, and the sourc", + "desc":"You can migrate data between DCS instances by importing backup files.To migrate to an instance with SSL enabled, disable the SSL setting first. For details, see Transmitt", "product_code":"dcs", "title":"Backup Import Between DCS Redis Instances", "uri":"dcs-migration-0312004.html", "doc_type":"usermanual", - "p_code":"125", - "code":"127" + "p_code":"126", + "code":"128" }, { "desc":"HUAWEI CLOUD Help Center presents technical documents to help you quickly get started with HUAWEI CLOUD services. The technical documents include Service Overview, Price Details, Purchase Guide, User Guide, API Reference, Best Practices, FAQs, and Videos.", @@ -1148,8 +1157,8 @@ "title":"Migration from Another Cloud", "uri":"dcs-migration-0312005.html", "doc_type":"usermanual", - "p_code":"114", - "code":"128" + "p_code":"115", + "code":"129" }, { "desc":"If the source and target instances are interconnected and the SYNC and PSYNC commands are supported by the source instance, data can be migrated online in full or increme", @@ -1157,8 +1166,8 @@ "title":"Migrating Redis from Another Cloud Online", "uri":"dcs-migration-0312006.html", "doc_type":"usermanual", - "p_code":"128", - "code":"129" + "p_code":"129", + "code":"130" }, { "desc":"This section describes how to migrate Redis from another cloud to DCS by importing backup files.Simply download the source Redis data and then upload the data to an OBS b", @@ -1166,8 +1175,8 @@ "title":"Backup Import from Another Cloud", "uri":"dcs-migration-1117001.html", "doc_type":"usermanual", - "p_code":"128", - "code":"130" + "p_code":"129", + "code":"131" }, { "desc":"Redis instances provided by some cloud service vendors do not allow SLAVEOF, BGSAVE, and PSYNC commands to be issued from Redis clients. As a result, redis-cli, redis-sha", @@ -1175,8 +1184,8 @@ "title":"Online Migration from Another Cloud Using Rump", "uri":"dcs-migration-090626001_0.html", "doc_type":"usermanual", - "p_code":"128", - "code":"131" + "p_code":"129", + "code":"132" }, { "desc":"redis-shake is an open-source tool for migrating data online or offline (by importing backup files) between Redis Clusters. If the source Redis Cluster is deployed in ano", @@ -1184,8 +1193,8 @@ "title":"Backup Import from Another Cloud Using redis-shake", "uri":"dcs-migrate-1117003.html", "doc_type":"usermanual", - "p_code":"128", - "code":"132" + "p_code":"129", + "code":"133" }, { "desc":"redis-shake is an open-source Redis migration tool. Its rump mode allows you to obtain the full data of a source Redis using the SCAN command and write the data to a targ", @@ -1193,8 +1202,8 @@ "title":"Migrating from Another Cloud Online Using redis-shake", "uri":"dcs-migrate-0220411.html", "doc_type":"usermanual", - "p_code":"128", - "code":"133" + "p_code":"129", + "code":"134" }, { "desc":"You can use the online migration function of the DCS console to migrate DCS Redis instances to your self-hosted Redis. You can also export the DCS instance data to an RDB", @@ -1202,8 +1211,8 @@ "title":"Migrating Data from DCS to Self-Hosted Redis", "uri":"dcs-migration-0312007.html", "doc_type":"usermanual", - "p_code":"114", - "code":"134" + "p_code":"115", + "code":"135" }, { "desc":"HUAWEI CLOUD Help Center presents technical documents to help you quickly get started with HUAWEI CLOUD services. The technical documents include Service Overview, Price Details, Purchase Guide, User Guide, API Reference, Best Practices, FAQs, and Videos.", @@ -1212,7 +1221,7 @@ "uri":"dcs-faq-0326019.html", "doc_type":"usermanual", "p_code":"", - "code":"135" + "code":"136" }, { "desc":"HUAWEI CLOUD Help Center presents technical documents to help you quickly get started with HUAWEI CLOUD services. The technical documents include Service Overview, Price Details, Purchase Guide, User Guide, API Reference, Best Practices, FAQs, and Videos.", @@ -1220,8 +1229,8 @@ "title":"Client and Network Connection", "uri":"dcs-faq-0326020.html", "doc_type":"usermanual", - "p_code":"135", - "code":"136" + "p_code":"136", + "code":"137" }, { "desc":"DCS helps you control access to your DCS instances in the following ways, depending on the deployment mode:To control access to DCS Redis 3.0 instances, you can use secur", @@ -1229,8 +1238,8 @@ "title":"Security Group Configurations", "uri":"en-us_topic_0090662012.html", "doc_type":"usermanual", - "p_code":"136", - "code":"137" + "p_code":"137", + "code":"138" }, { "desc":"No. DCS instances cannot be accessed at their EIPs over public networks. To ensure security, the ECS that serves as a client and the DCS instance that the client will acc", @@ -1238,8 +1247,8 @@ "title":"Does DCS Support Access over Public Networks?", "uri":"dcs-faq-0730001.html", "doc_type":"usermanual", - "p_code":"136", - "code":"138" + "p_code":"137", + "code":"139" }, { "desc":"Cross-VPC means the client and the instance are not in the same VPC.Generally, VPCs are isolated from each other and ECSs cannot access DCS instances that belong to a dif", @@ -1247,8 +1256,8 @@ "title":"Does DCS Support Cross-VPC Access?", "uri":"en-us_topic_0100698850.html", "doc_type":"usermanual", - "p_code":"136", - "code":"139" + "p_code":"137", + "code":"140" }, { "desc":"This is because you have enabled password-free access for the instance. To prevent the error message from appearing, do not enter any password.", @@ -1256,8 +1265,8 @@ "title":"Why Is \"(error) NOAUTH Authentication required\" Displayed When I Access a DCS Redis Instance?", "uri":"dcs-faq-0427005.html", "doc_type":"usermanual", - "p_code":"136", - "code":"140" + "p_code":"137", + "code":"141" }, { "desc":"Analysis: If persistent connections (\"pconnect\" in Redis terminology) or connection pooling is used and connections are closed after being used for connecting to DCS inst", @@ -1265,8 +1274,8 @@ "title":"What Should I Do If Access to DCS Fails After Server Disconnects?", "uri":"dcs-faq-0730004.html", "doc_type":"usermanual", - "p_code":"136", - "code":"141" + "p_code":"137", + "code":"142" }, { "desc":"Occasional timeout errors are normal because of network connectivity and client timeout configurations.You are advised to include reconnection operations into your servic", @@ -1274,8 +1283,8 @@ "title":"Why Do Requests Sometimes Time Out in Clients?", "uri":"dcs-faq-0730005.html", "doc_type":"usermanual", - "p_code":"136", - "code":"142" + "p_code":"137", + "code":"143" }, { "desc":"The error message that will possibly be displayed when you use the Jedis connection pool is as follows:If this error message is displayed, check whether your instance is ", @@ -1283,8 +1292,8 @@ "title":"What Should I Do If an Error Is Returned When I Use the Jedis Connection Pool?", "uri":"dcs-faq-0730006.html", "doc_type":"usermanual", - "p_code":"136", - "code":"143" + "p_code":"137", + "code":"144" }, { "desc":"The possible causes are as follows:The command is spelled incorrectly.As shown in the following figure, the error message is returned because the correct command for dele", @@ -1292,8 +1301,8 @@ "title":"Why Is \"ERR unknown command\" Displayed When I Access a DCS Redis Instance Through a Redis Client?", "uri":"dcs-faq-0730007.html", "doc_type":"usermanual", - "p_code":"136", - "code":"144" + "p_code":"137", + "code":"145" }, { "desc":"You can access a DCS Redis instance through the Redis Desktop Manager within a VPC.Enter the address, port number (6379), and authentication password of the DCS instance ", @@ -1301,8 +1310,8 @@ "title":"How Do I Access a DCS Redis Instance Through Redis Desktop Manager?", "uri":"dcs-faq-0730008.html", "doc_type":"usermanual", - "p_code":"136", - "code":"145" + "p_code":"137", + "code":"146" }, { "desc":"By using DCS Redis instances, Spring Session can implement session sharing. When interconnecting with Spring Cloud, the following error information is displayed:For secur", @@ -1310,8 +1319,8 @@ "title":"What If \"ERR Unsupported CONFIG subcommand\" is Displayed in SpringCloud?", "uri":"dcs-faq-0730009.html", "doc_type":"usermanual", - "p_code":"136", - "code":"146" + "p_code":"137", + "code":"147" }, { "desc":"A DCS Redis instance can be access with or without a password. You can directly access a DCS Redis instance through a Redis client without setting a password. However, fo", @@ -1319,8 +1328,8 @@ "title":"Is a Password Required for Accessing an Instance? How Do I Set a Password?", "uri":"dcs-faq-0427015.html", "doc_type":"usermanual", - "p_code":"136", - "code":"147" + "p_code":"137", + "code":"148" }, { "desc":"Pay attention to the following issues when using Redis for pub/sub:Your client must process messages in a timely manner.Your client subscribes to a channel. If it does no", @@ -1328,8 +1337,8 @@ "title":"What Should Be Noted When Using Redis for Pub/Sub?", "uri":"dcs-faq-0730011.html", "doc_type":"usermanual", - "p_code":"136", - "code":"148" + "p_code":"137", + "code":"149" }, { "desc":"Preliminary checks:Check the connection address.Obtain the connection address from the instance basic information page on the DCS console.Obtain the connection address fr", @@ -1337,8 +1346,8 @@ "title":"How Do I Troubleshoot Redis Connection Failures?", "uri":"dcs-faq-0730010.html", "doc_type":"usermanual", - "p_code":"136", - "code":"149" + "p_code":"137", + "code":"150" }, { "desc":"Error message \"Cannot assign requested address\" is returned when you access Redis using connect.Applications that encounter this error typically use php-fpm and phpredis.", @@ -1346,8 +1355,8 @@ "title":"What Can I Do If Error \"Cannot assign requested address\" Is Returned When I Access Redis Using connect?", "uri":"dcs-faq-210721003.html", "doc_type":"usermanual", - "p_code":"136", - "code":"150" + "p_code":"137", + "code":"151" }, { "desc":"The comparison between Lettuce and Jedis is as follows:LettuceLettuce does not perform connection keepalive detection. If an abnormal connection exists in the connection ", @@ -1355,8 +1364,8 @@ "title":"Connection Pool Selection and Recommended Jedis Parameter Settings", "uri":"dcs-faq-211230001.html", "doc_type":"usermanual", - "p_code":"136", - "code":"151" + "p_code":"137", + "code":"152" }, { "desc":"Single-node, read/write splitting, and Proxy Cluster:Each instance has only one IP address and one domain name address. The addresses remain unchanged before and after ma", @@ -1364,8 +1373,8 @@ "title":"Should I Use a Domain Name or an IP Address to Connect to a DCS Redis Instance?", "uri":"dcs-faq-022025.html", "doc_type":"usermanual", - "p_code":"136", - "code":"152" + "p_code":"137", + "code":"153" }, { "desc":"A master/standby DCS Redis 4.0 or later instance has a Connection Address and a Read-only Address. The connection address is used to connect to the master node of the ins", @@ -1373,8 +1382,8 @@ "title":"Is the Read-only Address of a Master/Standby Instance Connected to the Master or Standby Node?", "uri":"dcs-faq-221222.html", "doc_type":"usermanual", - "p_code":"136", - "code":"153" + "p_code":"137", + "code":"154" }, { "desc":"HUAWEI CLOUD Help Center presents technical documents to help you quickly get started with HUAWEI CLOUD services. The technical documents include Service Overview, Price Details, Purchase Guide, User Guide, API Reference, Best Practices, FAQs, and Videos.", @@ -1382,8 +1391,8 @@ "title":"Redis Usage", "uri":"dcs-faq-0326021.html", "doc_type":"usermanual", - "p_code":"135", - "code":"154" + "p_code":"136", + "code":"155" }, { "desc":"Possible cause 1:The service QPS is so high that the CPU usage spikes to 100%.The service QPS is so high that the CPU usage spikes to 100%.Possible cause 2:You have run c", @@ -1391,8 +1400,8 @@ "title":"Why Is CPU Usage of a DCS Redis Instance 100%?", "uri":"dcs-faq-0730012.html", "doc_type":"usermanual", - "p_code":"154", - "code":"155" + "p_code":"155", + "code":"156" }, { "desc":"No. Once an instance is created, its VPC and subnet cannot be changed. If you want to use a different set of VPC and subnet, create a same instance and specify a desired ", @@ -1400,8 +1409,8 @@ "title":"Can I Change the VPC and Subnet for a DCS Redis Instance?", "uri":"dcs-faq-0730013.html", "doc_type":"usermanual", - "p_code":"154", - "code":"156" + "p_code":"155", + "code":"157" }, { "desc":"Currently, DCS Redis 4.0 and later instances use VPC endpoints and do not support security groups. You can configure whitelists instead. For details, see Managing IP Addr", @@ -1409,8 +1418,8 @@ "title":"Why Aren't Security Groups Configured for DCS Redis 4.0 and Later Instances?", "uri":"dcs-faq-0730014.html", "doc_type":"usermanual", - "p_code":"154", - "code":"157" + "p_code":"155", + "code":"158" }, { "desc":"The maximum allowed size of a key is 512 MB.To reduce memory usage and facilitate key query, ensure that each key does not exceed 1 KB.To reduce memory usage and facilita", @@ -1418,8 +1427,8 @@ "title":"Do DCS Redis Instances Limit the Size of a Key or Value?", "uri":"dcs-faq-0730015.html", "doc_type":"usermanual", - "p_code":"154", - "code":"158" + "p_code":"155", + "code":"159" }, { "desc":"Cluster DCS Redis 3.0 instances (Proxy Cluster type) are used in the same way that you use single-node or master/standby instances. You do not need to know the backend no", @@ -1427,8 +1436,8 @@ "title":"Can I Obtain the Addresses of the Nodes in a Cluster DCS Redis Instance?", "uri":"dcs-faq-0730017.html", "doc_type":"usermanual", - "p_code":"154", - "code":"159" + "p_code":"155", + "code":"160" }, { "desc":"DCS Redis 3.0 instances are deployed on VMs and some memory is reserved for system overheads. This problem will not occur on other instance versions.", @@ -1436,17 +1445,17 @@ "title":"Why Is Available Memory Smaller Than Instance Cache Size?", "uri":"dcs-faq-0730018.html", "doc_type":"usermanual", - "p_code":"154", - "code":"160" + "p_code":"155", + "code":"161" }, { - "desc":"Both single-node and master/standby DCS Redis instances support multiple databases. By default, single-node and master/standby DCS instances can read and write data in 25", + "desc":"DCS's support for multiple databases (multi-DB) is as follows:Single-node, read/write splitting, and master/standby DCS Redis instances: Multi-DB is supported. By default", "product_code":"dcs", - "title":"Does DCS for Redis Support Multiple Databases?", - "uri":"dcs-faq-0730019.html", + "title":"Does DCS for Redis Support Multi-DB?", + "uri":"dcs-faq-0427028.html", "doc_type":"usermanual", - "p_code":"154", - "code":"161" + "p_code":"155", + "code":"162" }, { "desc":"Yes. DCS for Redis 4.0 and later support Redis Clusters. DCS for Redis 3.0 supports Proxy Clusters.", @@ -1454,8 +1463,8 @@ "title":"Does DCS for Redis Support Redis Clusters?", "uri":"dcs-faq-0730020.html", "doc_type":"usermanual", - "p_code":"154", - "code":"162" + "p_code":"155", + "code":"163" }, { "desc":"Master/Standby, read/write splitting, and cluster DCS Redis 4.0 and later instances support Sentinels (Each shard of a cluster is a master/standby instance.). Sentinels m", @@ -1463,8 +1472,8 @@ "title":"Does DCS for Redis Support Sentinel?", "uri":"dcs-faq-0730021.html", "doc_type":"usermanual", - "p_code":"154", - "code":"163" + "p_code":"155", + "code":"164" }, { "desc":"Data is evicted from cache based on a user-defined space limit in order to make space for new data. For details, see the Redis official website. You can view or change th", @@ -1472,8 +1481,8 @@ "title":"What Is the Default Data Eviction Policy?", "uri":"dcs-faq-0730022.html", "doc_type":"usermanual", - "p_code":"154", - "code":"164" + "p_code":"155", + "code":"165" }, { "desc":"Start the Redis exporter using the CLI. Based on the output, check for errors and troubleshoot accordingly.", @@ -1481,8 +1490,8 @@ "title":"What Should I Do If an Error Occurs in Redis Exporter?", "uri":"dcs-faq-0730023.html", "doc_type":"usermanual", - "p_code":"154", - "code":"165" + "p_code":"155", + "code":"166" }, { "desc":"Redisson implements lock acquisition and unlocking in the following process:Redisson lock acquisition and unlocking are implemented by running Lua scripts.During lock acq", @@ -1490,8 +1499,8 @@ "title":"Why Is Redisson Distributed Lock Not Supported by DCS Proxy Cluster Redis 3.0 Instances?", "uri":"dcs-faq-0730025.html", "doc_type":"usermanual", - "p_code":"154", - "code":"166" + "p_code":"155", + "code":"167" }, { "desc":"You cannot customize or change the port for accessing a DCS Redis 3.0 instance. You can customize (during instance creation) and change the port (on the instance details ", @@ -1499,8 +1508,8 @@ "title":"Can I Customize or Change the Port for Accessing a DCS Instance?", "uri":"dcs-faq-0730026.html", "doc_type":"usermanual", - "p_code":"154", - "code":"167" + "p_code":"155", + "code":"168" }, { "desc":"After a DCS instance is created, its intra-VPC connection addresses cannot be modified.To use a different IP address, you must create a new instance and manually specify ", @@ -1508,8 +1517,8 @@ "title":"Can I Modify the Connection Addresses for Accessing a DCS Instance?", "uri":"dcs-faq-0730027.html", "doc_type":"usermanual", - "p_code":"154", - "code":"168" + "p_code":"155", + "code":"169" }, { "desc":"Master/Standby, read/write splitting, and cluster DCS Redis instances can be deployed across availability zones (AZs).If instance nodes in an AZ are faulty, nodes in othe", @@ -1517,8 +1526,8 @@ "title":"Does DCS Support Cross-AZ Deployment?", "uri":"dcs-faq-0730029.html", "doc_type":"usermanual", - "p_code":"154", - "code":"169" + "p_code":"155", + "code":"170" }, { "desc":"Possible cause: When a cluster instance is started, status and data are synchronized between the nodes of the instance. If a large amount of data is continuously written ", @@ -1526,8 +1535,8 @@ "title":"Why Does It Take a Long Time to Start a Cluster DCS Instance?", "uri":"dcs-faq-0730030.html", "doc_type":"usermanual", - "p_code":"154", - "code":"170" + "p_code":"155", + "code":"171" }, { "desc":"No. If you wish to query Redis configurations and usage information, use redis-cli. If you wish to monitor DCS Redis instance metrics, go to the Cloud Eye console. For de", @@ -1535,8 +1544,8 @@ "title":"Does DCS for Redis Provide Backend Management Software?", "uri":"dcs-faq-0730032.html", "doc_type":"usermanual", - "p_code":"154", - "code":"171" + "p_code":"155", + "code":"172" }, { "desc":"If a DCS instance is automatically deleted or manually deleted through the Redis client, its data cannot be retrieved. If you have backed up the instance, you can restore", @@ -1544,8 +1553,8 @@ "title":"Can I Recover Data from Deleted DCS Instances?", "uri":"dcs-faq-0730034.html", "doc_type":"usermanual", - "p_code":"154", - "code":"172" + "p_code":"155", + "code":"173" }, { "desc":"Symptom: \"Error in execution; nested exception is io.lettuce.core.RedisCommandExecutionException: OOM command not allowed when used memory > 'maxmemory'\" is returned duri", @@ -1553,8 +1562,8 @@ "title":"Why Is \"Error in execution\" Returned When I Access Redis?", "uri":"dcs-faq-210223001.html", "doc_type":"usermanual", - "p_code":"154", - "code":"173" + "p_code":"155", + "code":"174" }, { "desc":"Normally, Redis keys do not disappear. If a key is missing, it may have expired, been evicted, or been deleted.Perform the following checks one by one:Check whether the k", @@ -1562,8 +1571,17 @@ "title":"Why Does a Key Disappear in Redis?", "uri":"dcs-faq-210409001.html", "doc_type":"usermanual", - "p_code":"154", - "code":"174" + "p_code":"155", + "code":"175" + }, + { + "desc":"Note the following constraints when you consider implementing multi-DB:Usage constraints:The SWAPDB command does not support multi-DB.The INFO KEYSPACE command does not r", + "product_code":"dcs", + "title":"Notes and Procedure for Enabling Multi-DB for Proxy Cluster Instances", + "uri":"dcs-faq-210804001.html", + "doc_type":"usermanual", + "p_code":"155", + "code":"176" }, { "desc":"Multi-key operations, such as those using the MSET command or Lua scripts, are atomic. All specified keys are executed at the same time. However, in a cluster, each key i", @@ -1571,8 +1589,8 @@ "title":"Explaining and Using Hash Tags", "uri":"dcs-faq-211228001.html", "doc_type":"usermanual", - "p_code":"154", - "code":"175" + "p_code":"155", + "code":"177" }, { "desc":"After a single-node DCS instance is restarted, data in the instance is deleted.Master/Standby, read/write splitting, and cluster instances (except single-replica clusters", @@ -1580,8 +1598,17 @@ "title":"Will Cached Data Be Retained After an Instance Is Restarted?", "uri":"dcs-faq-0220330.html", "doc_type":"usermanual", - "p_code":"154", - "code":"176" + "p_code":"155", + "code":"178" + }, + { + "desc":"When you create a Proxy Cluster instance, there is only one database by default. This section describes how to create a Proxy Cluster instance with multiple databases.Bef", + "product_code":"dcs", + "title":"How Do I Create a Multi-DB Proxy Cluster Instance?", + "uri":"dcs-faq-020220331.html", + "doc_type":"usermanual", + "p_code":"155", + "code":"179" }, { "desc":"HUAWEI CLOUD Help Center presents technical documents to help you quickly get started with HUAWEI CLOUD services. The technical documents include Service Overview, Price Details, Purchase Guide, User Guide, API Reference, Best Practices, FAQs, and Videos.", @@ -1589,8 +1616,8 @@ "title":"Redis Commands", "uri":"dcs-faq-190921003.html", "doc_type":"usermanual", - "p_code":"135", - "code":"177" + "p_code":"136", + "code":"180" }, { "desc":"Exercise caution when clearing data.Redis 3.0Data of a DCS Redis 3.0 instance cannot be cleared on the console, and can only be cleared by the FLUSHDB or FLUSHALL command", @@ -1598,8 +1625,8 @@ "title":"How Do I Clear Redis Data?", "uri":"dcs-faq-0730036.html", "doc_type":"usermanual", - "p_code":"177", - "code":"178" + "p_code":"180", + "code":"181" }, { "desc":"Yes. For more information about Redis command compatibility, see Command Compatibility.", @@ -1607,8 +1634,8 @@ "title":"Does DCS for Redis Support the INCR and EXPIRE Commands?", "uri":"dcs-faq-0730039.html", "doc_type":"usermanual", - "p_code":"177", - "code":"179" + "p_code":"180", + "code":"182" }, { "desc":"Possible causes include the following:The command is incorrect.As shown in the following figure, the error message is returned because the correct command for deleting a ", @@ -1616,8 +1643,8 @@ "title":"Why Do I Fail to Execute Some Redis Commands?", "uri":"dcs-faq-0730040.html", "doc_type":"usermanual", - "p_code":"177", - "code":"180" + "p_code":"180", + "code":"183" }, { "desc":"Run the command in redis-cli to check whether the command takes effect.The following describes two scenarios:Scenario 1: Set and query the value of a key to check whether", @@ -1625,8 +1652,8 @@ "title":"Why Does a Redis Command Fail to Take Effect?", "uri":"dcs-faq-0730041.html", "doc_type":"usermanual", - "p_code":"177", - "code":"181" + "p_code":"180", + "code":"184" }, { "desc":"Redis timeouts happen on the client or server.Timeouts on the client are managed in the client code. Services can determine an appropriate timeout. For example, parameter", @@ -1634,8 +1661,8 @@ "title":"Is There a Time Limit on Executing Redis Commands? What Will Happen If a Command Times Out?", "uri":"dcs-faq-0427057.html", "doc_type":"usermanual", - "p_code":"177", - "code":"182" + "p_code":"180", + "code":"185" }, { "desc":"No. Like in open-source Redis, keys in DCS for Redis are case-sensitive and cannot be configured to be case-insensitive.", @@ -1643,8 +1670,8 @@ "title":"Can I Configure Redis Keys to Be Case-Insensitive?", "uri":"dcs-faq-0427058.html", "doc_type":"usermanual", - "p_code":"177", - "code":"183" + "p_code":"180", + "code":"186" }, { "desc":"No. Redis does not record commands and does not support viewing the most frequently used commands.", @@ -1652,8 +1679,8 @@ "title":"Can I View the Most Frequently Used Redis Commands?", "uri":"dcs-faq-0624001.html", "doc_type":"usermanual", - "p_code":"177", - "code":"184" + "p_code":"180", + "code":"187" }, { "desc":"HUAWEI CLOUD Help Center presents technical documents to help you quickly get started with HUAWEI CLOUD services. The technical documents include Service Overview, Price Details, Purchase Guide, User Guide, API Reference, Best Practices, FAQs, and Videos.", @@ -1661,17 +1688,17 @@ "title":"Instance Scaling and Upgrade", "uri":"dcs-faq-0326022.html", "doc_type":"usermanual", - "p_code":"135", - "code":"185" + "p_code":"136", + "code":"188" }, { - "desc":"No. Different Redis versions use different underlying architectures. The Redis version used by a DCS instance cannot be changed once the instance is created. For example,", + "desc":"No. It is unavailable. Different Redis versions use different underlying architectures. The Redis version used by a DCS instance cannot be changed once the instance is cr", "product_code":"dcs", - "title":"Can DCS Redis Instances Be Upgraded, for Example, from Redis 4.0 to 5.0?", + "title":"Can the Major Version of a DCS Redis Instance Be Upgraded, for Example, from Redis 4.0 to 5.0?", "uri":"dcs-faq-0730043.html", "doc_type":"usermanual", - "p_code":"185", - "code":"186" + "p_code":"188", + "code":"189" }, { "desc":"O&M personnel will contact you before performing maintenance during the maintenance time window, informing you of the operations and their impacts. You do not need to wor", @@ -1679,8 +1706,8 @@ "title":"Are Services Interrupted If Maintenance is Performed During the Maintenance Time Window?", "uri":"dcs-faq-0730044.html", "doc_type":"usermanual", - "p_code":"185", - "code":"187" + "p_code":"188", + "code":"190" }, { "desc":"No. Specification modifications can take place while the instance is running and do not affect any other resources.", @@ -1688,8 +1715,8 @@ "title":"Are Instances Stopped or Restarted During Specification Modification?", "uri":"dcs-faq-0730045.html", "doc_type":"usermanual", - "p_code":"185", - "code":"188" + "p_code":"188", + "code":"191" }, { "desc":"You are advised to change the instance specifications during off-peak hours because specification modification has the following impacts:The following table lists scaling", @@ -1697,8 +1724,8 @@ "title":"Are Services Interrupted During Specification Modification?", "uri":"dcs-faq-0730047.html", "doc_type":"usermanual", - "p_code":"185", - "code":"189" + "p_code":"188", + "code":"192" }, { "desc":"Check whether other tasks are running.Specifications of a DCS instance cannot be modified if another task of the instance is still running. For example, you cannot delete", @@ -1706,8 +1733,8 @@ "title":"Why Can't I Modify Specifications for a DCS Redis Instance?", "uri":"dcs-faq-0730048.html", "doc_type":"usermanual", - "p_code":"185", - "code":"190" + "p_code":"188", + "code":"193" }, { "desc":"HUAWEI CLOUD Help Center presents technical documents to help you quickly get started with HUAWEI CLOUD services. The technical documents include Service Overview, Price Details, Purchase Guide, User Guide, API Reference, Best Practices, FAQs, and Videos.", @@ -1715,8 +1742,8 @@ "title":"Monitoring and Alarm", "uri":"dcs-faq-0326023.html", "doc_type":"usermanual", - "p_code":"135", - "code":"191" + "p_code":"136", + "code":"194" }, { "desc":"The number of connections received by a DCS instance is a metric that is monitored by Cloud Eye. For details on how to view metrics, see Viewing DCS Monitoring Metrics.On", @@ -1724,8 +1751,8 @@ "title":"How Do I View Current Concurrent Connections and Maximum Connections of a DCS Redis Instance?", "uri":"dcs-faq-0427070.html", "doc_type":"usermanual", - "p_code":"191", - "code":"192" + "p_code":"194", + "code":"195" }, { "desc":"No. To ensure high-performance reads and writes, Redis does not audit commands. Commands are not printed.", @@ -1733,8 +1760,8 @@ "title":"Does Redis Support Command Audits?", "uri":"dcs-faq-0730049.html", "doc_type":"usermanual", - "p_code":"191", - "code":"193" + "p_code":"194", + "code":"196" }, { "desc":"If you have any doubt on the monitoring data of a DCS Redis instance, you can access the instance through redis-cli and run the INFO ALL command to view the metrics. For ", @@ -1742,8 +1769,8 @@ "title":"What Should I Do If the Monitoring Data of a DCS Redis Instance Is Abnormal?", "uri":"dcs-faq-0730050.html", "doc_type":"usermanual", - "p_code":"191", - "code":"194" + "p_code":"194", + "code":"197" }, { "desc":"For single-node and master/standby DCS instances, the used instance memory is measured by the Redis-server process. For cluster DCS instances, the used cluster memory is ", @@ -1751,8 +1778,8 @@ "title":"Why Is Used Memory Greater Than Available Memory?", "uri":"dcs-faq-0730052.html", "doc_type":"usermanual", - "p_code":"191", - "code":"195" + "p_code":"194", + "code":"198" }, { "desc":"The basic information about the bandwidth usage metric is as follows.Bandwidth usage = (Input flow + Output flow)/(2 x Maximum bandwidth) x 100%According to the formula, ", @@ -1760,8 +1787,8 @@ "title":"Why Does Bandwidth Usage Exceed 100%?", "uri":"dcs-faq-0513001.html", "doc_type":"usermanual", - "p_code":"191", - "code":"196" + "p_code":"194", + "code":"199" }, { "desc":"If the Rejected Connections metric is displayed, check if the number of connected clients exceeds the maximum allowed number of connections of the instances.The Rejected ", @@ -1769,8 +1796,8 @@ "title":"Why Is the Rejected Connections Metric Displayed?", "uri":"dcs-faq-0603001.html", "doc_type":"usermanual", - "p_code":"191", - "code":"197" + "p_code":"194", + "code":"200" }, { "desc":"Flow control is triggered when the traffic used by a Redis instance in a period exceeds the maximum bandwidth.For details about the maximum bandwidth of an instance flavo", @@ -1778,8 +1805,8 @@ "title":"Why Is Flow Control Triggered? How Do I Handle It?", "uri":"dcs-faq-0220721.html", "doc_type":"usermanual", - "p_code":"191", - "code":"198" + "p_code":"194", + "code":"201" }, { "desc":"HUAWEI CLOUD Help Center presents technical documents to help you quickly get started with HUAWEI CLOUD services. The technical documents include Service Overview, Price Details, Purchase Guide, User Guide, API Reference, Best Practices, FAQs, and Videos.", @@ -1787,8 +1814,8 @@ "title":"Data Backup, Export, and Migration", "uri":"dcs-faq-0326024.html", "doc_type":"usermanual", - "p_code":"135", - "code":"199" + "p_code":"136", + "code":"202" }, { "desc":"For master/standby or cluster instances:Perform the following operations to export the data:On the Backups & Restorations page, view the backup records.If there are no ba", @@ -1796,8 +1823,8 @@ "title":"How Do I Export DCS Redis Instance Data?", "uri":"dcs-faq-0730053.html", "doc_type":"usermanual", - "p_code":"199", - "code":"200" + "p_code":"202", + "code":"203" }, { "desc":"Redis 3.0No. On the console, backup data of a DCS Redis 3.0 instance can be exported only to AOF files. To export data to RDB files, run the following command in redis-cl", @@ -1805,8 +1832,8 @@ "title":"Can I Export Backup Data of DCS Redis Instances to RDB Files Using the Console?", "uri":"dcs-faq-0730054.html", "doc_type":"usermanual", - "p_code":"199", - "code":"201" + "p_code":"202", + "code":"204" }, { "desc":"Single-node: NoMaster/Standby, read/write splitting, and cluster (except single-replica clusters): YesDCS Redis instances supports only AOF persistence by default. You ca", @@ -1814,8 +1841,8 @@ "title":"Do DCS Redis Instances Support Data Persistence? What Is the Impact of Persistence?", "uri":"dcs-faq-0427081.html", "doc_type":"usermanual", - "p_code":"199", - "code":"202" + "p_code":"202", + "code":"205" }, { "desc":"AOF rewrites involve the following concepts:Rewrite window, which is currently 01:00 to 04:59Disk usage threshold, which is 50%Dataset memory, which is the percentage of ", @@ -1823,8 +1850,8 @@ "title":"When Will AOF Rewrites Be Triggered?", "uri":"dcs-faq-210706001.html", "doc_type":"usermanual", - "p_code":"199", - "code":"203" + "p_code":"202", + "code":"206" }, { "desc":"No. A migration task allows data to be migrated to only one target instance. To migrate data to multiple target instances, create multiple migration tasks.", @@ -1832,8 +1859,8 @@ "title":"Can I Migrate Data to Multiple Target Instances in One Migration Task?", "uri":"dcs-faq-220317.html", "doc_type":"usermanual", - "p_code":"199", - "code":"204" + "p_code":"202", + "code":"207" }, { "desc":"Migration within DCS:If the online migration task uses the same account and region as the source instance, select a DCS instance (cloud Redis) as the source. The SYNC and", @@ -1841,8 +1868,8 @@ "title":"How Do I Enable the SYNC and PSYNC Commands?", "uri":"dcs-faq-210721001.html", "doc_type":"usermanual", - "p_code":"199", - "code":"205" + "p_code":"202", + "code":"208" }, { "desc":"If the data exists on both the source and target instances, the target data is overwritten by the source data. If the data exists only on the target instance, the data wi", @@ -1850,8 +1877,8 @@ "title":"Will the Same Keys Be Overwritten During Data Migration or Backup Import?", "uri":"dcs-faq-11185.html", "doc_type":"usermanual", - "p_code":"199", - "code":"206" + "p_code":"202", + "code":"209" }, { "desc":"Rump is an open-source tool designed for migrating Redis data online. It supports migration between DBs of the same instance and between DBs of different instances.Rump u", @@ -1859,8 +1886,8 @@ "title":"Online Migration with Rump", "uri":"dcs-migration-090626001.html", "doc_type":"usermanual", - "p_code":"199", - "code":"207" + "p_code":"202", + "code":"210" }, { "desc":"Convert the format of a data file before importing the file.Run the following command to convert the format of a file in the Windows OS to that in the Unix-like OS:dos2un", @@ -1868,8 +1895,8 @@ "title":"What Should I Consider When Transferring or Operating Data Between Different OSs?", "uri":"dcs-migration-0312016.html", "doc_type":"usermanual", - "p_code":"199", - "code":"208" + "p_code":"202", + "code":"211" }, { "desc":"A total of 256 DBs (DB 0 to DB 255) can be configured for a single-node, read/write splitting, or master/standby DCS instance.If the target is a cluster instance (a clust", @@ -1877,8 +1904,8 @@ "title":"Can I Migrate Data from a Multi-DB Source Redis Instance to a Cluster DCS Redis Instance?", "uri":"dcs-migration-0312017.html", "doc_type":"usermanual", - "p_code":"199", - "code":"209" + "p_code":"202", + "code":"212" }, { "desc":"The online migration function provided on the console does not support migration of specified DBs. If you want to migrate specified Redis DBs, use redis-shake to export o", @@ -1886,8 +1913,8 @@ "title":"How Can I Migrate Partial Data?", "uri":"dcs-migration-0312018.html", "doc_type":"usermanual", - "p_code":"199", - "code":"210" + "p_code":"202", + "code":"213" }, { "desc":"Proxy Cluster instancesProxy Cluster instances are used in the same way that you use single-node or master/standby instances. However, only one DB is configured for a Pro", @@ -1895,8 +1922,8 @@ "title":"What Are the Constraints and Precautions for Migrating Redis Data to a Cluster Instance?", "uri":"dcs-migration-0312019.html", "doc_type":"usermanual", - "p_code":"199", - "code":"211" + "p_code":"202", + "code":"214" }, { "desc":"NetworkBefore online migration, ensure that the network configured for the migration task is connected to source and target Redis instances.Before online migration, ensur", @@ -1904,8 +1931,8 @@ "title":"What Should I Consider for Online Migration?", "uri":"dcs-migration-0312020.html", "doc_type":"usermanual", - "p_code":"199", - "code":"212" + "p_code":"202", + "code":"215" }, { "desc":"Yes. You can use the application dual-write mode. In this mode, during data migration, data is still read from the source Redis instance, and operations such as adding, d", @@ -1913,8 +1940,8 @@ "title":"Can I Perform Online Migration Without Any Service Interruption?", "uri":"dcs-migration-0312021.html", "doc_type":"usermanual", - "p_code":"199", - "code":"213" + "p_code":"202", + "code":"216" }, { "desc":"The following error messages may be displayed during online migration:\"Disconnecting timedout slave\" is reported on the source instance, as shown in the following figure:", @@ -1922,8 +1949,8 @@ "title":"What If \"Disconnecting timedout slave\" and \"overcoming of output buffer limits\" Are Reported on the Source Instance During Online Migration?", "uri":"dcs-migration-211125001.html", "doc_type":"usermanual", - "p_code":"199", - "code":"214" + "p_code":"202", + "code":"217" }, { "desc":"For details on how to use Rump, see the Data Migration Guide.Possible causes:Rump does not support migration to cluster DCS instances.Commands are incorrectly run in Rump", @@ -1931,8 +1958,8 @@ "title":"Why Is Memory of a DCS Redis Instance Unchanged After Data Migration Using Rump, Even If No Error Message Is Returned?", "uri":"dcs-faq-0427076.html", "doc_type":"usermanual", - "p_code":"199", - "code":"215" + "p_code":"202", + "code":"218" }, { "desc":"Yes. Redis is backward compatible.The version of the source Redis (DCS, self-built, or another cloud) can be earlier than or the same as the target DCS instance.", @@ -1940,8 +1967,8 @@ "title":"Can I Migrate Data from a Lower Redis Version to a Higher One?", "uri":"dcs-migration-0715005.html", "doc_type":"usermanual", - "p_code":"199", - "code":"216" + "p_code":"202", + "code":"219" }, { "desc":"HUAWEI CLOUD Help Center presents technical documents to help you quickly get started with HUAWEI CLOUD services. The technical documents include Service Overview, Price Details, Purchase Guide, User Guide, API Reference, Best Practices, FAQs, and Videos.", @@ -1949,8 +1976,8 @@ "title":"Big/Hot Key Analysis and Expired Key Scan", "uri":"dcs-faq-0805001.html", "doc_type":"usermanual", - "p_code":"135", - "code":"217" + "p_code":"136", + "code":"220" }, { "desc":"HUAWEI CLOUD Help Center presents technical documents to help you quickly get started with HUAWEI CLOUD services. The technical documents include Service Overview, Price Details, Purchase Guide, User Guide, API Reference, Best Practices, FAQs, and Videos.", @@ -1958,8 +1985,8 @@ "title":"What Are Big Keys and Hot Keys?", "uri":"dcs-faq-0521003.html", "doc_type":"usermanual", - "p_code":"217", - "code":"218" + "p_code":"220", + "code":"221" }, { "desc":"HUAWEI CLOUD Help Center presents technical documents to help you quickly get started with HUAWEI CLOUD services. The technical documents include Service Overview, Price Details, Purchase Guide, User Guide, API Reference, Best Practices, FAQs, and Videos.", @@ -1967,8 +1994,8 @@ "title":"What Is the Impact of Big Keys or Hot Keys?", "uri":"dcs-faq-0521004.html", "doc_type":"usermanual", - "p_code":"217", - "code":"219" + "p_code":"220", + "code":"222" }, { "desc":"Keep the size of Strings within 10 KB and the quantity of Hashes, Lists, Sets, or Zsets within 5000.When naming keys, use the service name abbreviation as the prefix and ", @@ -1976,8 +2003,8 @@ "title":"How Do I Avoid Big Keys and Hot Keys?", "uri":"dcs-faq-0521005.html", "doc_type":"usermanual", - "p_code":"217", - "code":"220" + "p_code":"220", + "code":"223" }, { "desc":"DCS for Redis 3.0 does not support hot key analysis on the console. Alternatively, you can use the following methods to analyze hot keys:Method 1: Analyze the service str", @@ -1985,8 +2012,8 @@ "title":"How Do I Analyze the Hot Keys of a DCS Redis 3.0 Instance?", "uri":"dcs-faq-0521006.html", "doc_type":"usermanual", - "p_code":"217", - "code":"221" + "p_code":"220", + "code":"224" }, { "desc":"Hot key analysis is not supported by DCS Redis 3.0 instances. You can configure alarms to detect hot keys.Configure alarm rules for the Memory Usage metric of the instanc", @@ -1994,8 +2021,8 @@ "title":"How Do I Detect Big Keys and Hot Keys in Advance?", "uri":"dcs-faq-0606002.html", "doc_type":"usermanual", - "p_code":"217", - "code":"222" + "p_code":"220", + "code":"225" }, { "desc":"What are the rules for scheduled deletion of expired keys on a daily basis? Can I customize the rules?Lazy free deletion: The deletion strategy is controlled in the main ", @@ -2003,8 +2030,8 @@ "title":"How Does DCS Delete Expired Keys?", "uri":"dcs-faq-210531002.html", "doc_type":"usermanual", - "p_code":"217", - "code":"223" + "p_code":"220", + "code":"226" }, { "desc":"Key storage durationKeys that do not have an expiration are stored permanently.Keys that have an expiration are deleted after they expire. For details, see Scanning Expir", @@ -2012,8 +2039,8 @@ "title":"How Long Are Keys Stored? How Do I Set Key Expiration?", "uri":"dcs-faq-210812001.html", "doc_type":"usermanual", - "p_code":"217", - "code":"224" + "p_code":"220", + "code":"227" }, { "desc":"HUAWEI CLOUD Help Center presents technical documents to help you quickly get started with HUAWEI CLOUD services. The technical documents include Service Overview, Price Details, Purchase Guide, User Guide, API Reference, Best Practices, FAQs, and Videos.", @@ -2021,8 +2048,8 @@ "title":"Master/Standby Switchover", "uri":"dcs-faq-191204001.html", "doc_type":"usermanual", - "p_code":"135", - "code":"225" + "p_code":"136", + "code":"228" }, { "desc":"A master/standby switchover may occur in the following scenarios:A master/standby switchover operation is initiated on the DCS Console.If the master node of a master/stan", @@ -2030,8 +2057,8 @@ "title":"When Does a Master/Standby Switchover Occur?", "uri":"dcs-faq-0730058.html", "doc_type":"usermanual", - "p_code":"225", - "code":"226" + "p_code":"228", + "code":"229" }, { "desc":"If a fault occurs in a master/standby or cluster DCS instance, a failover is triggered automatically. Services may be interrupted for less than half a minute during excep", @@ -2039,8 +2066,8 @@ "title":"How Does Master/Standby Switchover Affect Services?", "uri":"dcs-faq-0730059.html", "doc_type":"usermanual", - "p_code":"225", - "code":"227" + "p_code":"228", + "code":"230" }, { "desc":"No. If the master fails, the standby node will be promoted to master and takes the original IP address.", @@ -2048,8 +2075,8 @@ "title":"Does the Client Need to Switch the Connection Address After a Master/Standby Switchover?", "uri":"dcs-faq-0730060.html", "doc_type":"usermanual", - "p_code":"225", - "code":"228" + "p_code":"228", + "code":"231" }, { "desc":"Redis master/standby instances are also called master/slave instances. Generally, updates to the master cache node are automatically and asynchronously replicated to the ", @@ -2057,8 +2084,8 @@ "title":"How Does Redis Master/Standby Replication Work?", "uri":"dcs-faq-0730061.html", "doc_type":"usermanual", - "p_code":"225", - "code":"229" + "p_code":"228", + "code":"232" }, { "desc":"For details about the terms involved in this document, see Glossary.", @@ -2067,7 +2094,7 @@ "uri":"en-us_topic_0072429345.html", "doc_type":"usermanual", "p_code":"", - "code":"230" + "code":"233" }, { "desc":"HUAWEI CLOUD Help Center presents technical documents to help you quickly get started with HUAWEI CLOUD services. The technical documents include Service Overview, Price Details, Purchase Guide, User Guide, API Reference, Best Practices, FAQs, and Videos.", @@ -2076,6 +2103,6 @@ "uri":"dcs-ug-0326026.html", "doc_type":"usermanual", "p_code":"", - "code":"231" + "code":"234" } ] \ No newline at end of file diff --git a/docs/dcs/umn/CacheMasterSlave.html b/docs/dcs/umn/CacheMasterSlave.html index 25b9df336..badf90f5d 100644 --- a/docs/dcs/umn/CacheMasterSlave.html +++ b/docs/dcs/umn/CacheMasterSlave.html @@ -2,7 +2,7 @@

Master/Standby Redis

This section describes master/standby DCS Redis instances.

-

You cannot upgrade the Redis version for an instance. For example, a master/standby DCS Redis 4.0 instance cannot be upgraded to a master/standby DCS Redis 5.0 instance. If your service requires the features of higher Redis versions, create a DCS Redis instance of a higher version and then migrate data from the old instance to the new one.

+

The major version cannot be upgraded. For example, a master/standby DCS Redis 4.0 instance cannot be upgraded to a master/standby DCS Redis 5.0 one. If your service requires the features of higher Redis versions, create a DCS Redis instance of a higher version and then migrate data from the old instance to the new one.

Features

Master/Standby DCS instances have higher availability and reliability than single-node DCS instances.

Master/Standby DCS instances have the following features:

diff --git a/docs/dcs/umn/CacheProxy.html b/docs/dcs/umn/CacheProxy.html index 3d94be3b5..312a067d5 100644 --- a/docs/dcs/umn/CacheProxy.html +++ b/docs/dcs/umn/CacheProxy.html @@ -13,7 +13,7 @@ -

4 GB/8 GB/16 GB/24 GB/32 GB

+

4GB/8GB/16GB/24GB/32GB

3

diff --git a/docs/dcs/umn/CacheSingleNode.html b/docs/dcs/umn/CacheSingleNode.html index 0931cd1fa..1dedba5e0 100644 --- a/docs/dcs/umn/CacheSingleNode.html +++ b/docs/dcs/umn/CacheSingleNode.html @@ -2,27 +2,23 @@

Single-Node Redis

A single-node DCS Redis instance has only one node and does not support data persistence. They are suitable for cache services that do not require data reliability.

-
  • You cannot upgrade the Redis version of an instance. For example, a single-node DCS instance cannot be upgraded from Redis 4.0 to Redis 5.0. If you need Redis features of later versions, create a DCS Redis instance of a later version and then migrate data from the earlier instance to the new one.
  • Single-node instances cannot ensure data persistence and do not support manual or scheduled data backup. Exercise caution before using them.
+
  • The major version cannot be upgraded. For example, a single-node DCS Redis 4.0 instance cannot be upgraded to a single-node DCS Redis 5.0 one. If you need Redis features of later versions, create a DCS Redis instance of a later version and then migrate data from the earlier instance to the new one.
  • Single-node instances cannot ensure data persistence and do not support manual or scheduled data backup. Exercise caution before using them.
-

Features

  1. Low system overhead and high QPS

    Single-node instances do not support data synchronization or data persistence, reducing system overhead and supporting higher concurrency. QPS of single-node DCS Redis instances reaches up to 100,000.

    -
  2. Process monitoring and automatic fault recovery

    With an HA monitoring mechanism, if a single-node DCS instance becomes faulty, a new process is started within 30 seconds to resume service provisioning.

    -
  3. Out-of-the-box usability and no data persistence

    Single-node DCS instances can be used out of the box because they do not involve data loading. If your service requires high QPS, you can warm up the data beforehand to avoid strong concurrency impact on the backend database.

    -
  4. Low-cost and suitable for development and testing

    Single-node instances are 40% cheaper than master/standby DCS instances, suitable for setting up development or testing environments.

    +

    Features

    1. Low-cost and suitable for development and testing

      Single-node instances are 40% cheaper than master/standby DCS instances, suitable for setting up development or testing environments.

      +
    2. Non-persistent data

      Data persistence is not ensured through one master node for single-node instances. The data cannot be backed up.

    -

    In summary, single-node DCS instances support highly concurrent read/write operations, but do not support data persistence. Data will be deleted after instances are restarted or stopped. They are suitable for scenarios which do not require data persistence, such as database front-end caching, to accelerate access and ease the concurrency load off the backend. If the desired data does not exist in the cache, requests will go to the database. When restarting the service or the DCS instance, you can pre-generate cache data from the disk database to relieve pressure on the backend during startup.

    -

    Architecture

    Figure 1 shows the architecture of single-node DCS Redis instances.

    +

    Architecture

    Figure 1 shows the architecture of single-node DCS Redis instances.

    To access a DCS Redis 3.0 instance, you must use port 6379. To access a DCS Redis 4.0 or later instance, you can customize the port. If no port is specified, the default port 6379 will be used. In the following architecture, port 6379 is used. If you have customized a port, replace 6379 with the actual port.

    -
    Figure 1 Single-node DCS Redis instance architecture
    +
    Figure 1 Single-node DCS Redis instance architecture

    Architecture description:

    • VPC

      All server nodes of the instance run in the same VPC.

      -

      For intra-VPC access, the client and the instance must be in the same VPC. For a Redis 3.0 instance, security group rules are required.

      +

      For intra-VPC access, the client and the instance must be in the same VPC.

    • Application

      The client of the instance, which is the application running on an Elastic Cloud Server (ECS).

      DCS Redis instances are compatible with the Redis protocol, and can be accessed through open-source clients. For details about accessing DCS instances, see Accessing an Instance.

    • DCS instance

      A single-node DCS instance, which has only one node and one Redis process.

      -

      DCS monitors the availability of the instance in real time. If the Redis process becomes faulty, DCS starts a new process to resume service provisioning.

    diff --git a/docs/dcs/umn/PurchasePreparation.html b/docs/dcs/umn/PurchasePreparation.html index 2dd8a7d5a..64e6a9a95 100644 --- a/docs/dcs/umn/PurchasePreparation.html +++ b/docs/dcs/umn/PurchasePreparation.html @@ -2,11 +2,11 @@

    Identifying Requirements

    Before creating a DCS instance, identify your requirements and complete the following preparations:

    -
    1. Decide on the required cache engine version.

      Different Redis versions have different features. For details, see Comparing Redis Versions.

      -
    2. Decide on the required instance type.

      DCS provides single-node, master/standby, read/write splitting, Proxy Cluster, and Redis Cluster types of instances. Each type has its own architecture. For details about the instance architectures, see DCS Instance Types.

      +
      1. Decide on the required cache engine version.

        Different Redis versions have different features. For details, see Comparing DCS Redis Versions.

        +
      2. Decide on the required instance type.

        DCS provides read/write splitting, single-node, master/standby, Proxy Cluster, and Redis Cluster types of instances. Each type has its own architecture. For details about the instance architectures, see DCS Instance Types.

      3. Decide on the required instance specification.

        Each specification specifies the maximum available memory, number of connections, and bandwidth. For details, see DCS Instance Specifications.

      4. Decide on the region and whether cross-AZ deployment is required.

        Choose a region closest to your application to reduce latency.

        -

        A region consists of multiple availability zones (AZs) with physically isolated power supplies and networks. Master/Standby, read/write splitting, and cluster DCS instances can be deployed across AZs.

        +

        A region consists of multiple availability zones (AZs) with physically isolated power supplies and networks. Master/Standby, read/write splitting, and cluster DCS instances can be deployed across AZs. Applications can also be deployed across AZs to achieve HA for both data and applications.

        • If a master/standby, read/write splitting, or cluster DCS instance is deployed across AZs, faults in an AZ do not affect cache nodes in other AZs. This is because when the master node is faulty, the standby cache node will automatically become the master node to provide services. Such deployment achieves better disaster recovery.
        • Deploying a DCS instance across AZs slightly reduces network efficiency compared with deploying an instance within an AZ. Therefore, if a DCS instance is deployed across AZs, synchronization between master and standby cache nodes is slightly less efficient.
      5. Decide whether backup policies are required.

        Currently, backup restoration policies can be configured for instances other than single-node ones. For details about backup and restoration, see Overview.

        diff --git a/docs/dcs/umn/RedisDifference.html b/docs/dcs/umn/RedisDifference.html index 257c1f491..03b38fa05 100644 --- a/docs/dcs/umn/RedisDifference.html +++ b/docs/dcs/umn/RedisDifference.html @@ -2,7 +2,7 @@

        Comparing Redis Versions

        When creating a DCS Redis instance, you can select the cache engine version and the instance type.

        -
        • Version

          DCS supports Redis 3.0/4.0/5.0/6.0/7.0. The following table describes the differences between these versions.

          +
          • Version

            DCS supports Redis 3.0/4.0/5.0/6.0/7.0. The following table describes the differences between these versions.

            @@ -10,7 +10,7 @@ - @@ -63,7 +63,7 @@ - diff --git a/docs/dcs/umn/TagManagement.html b/docs/dcs/umn/TagManagement.html index 4dbaffe43..16a9199c9 100644 --- a/docs/dcs/umn/TagManagement.html +++ b/docs/dcs/umn/TagManagement.html @@ -24,7 +24,7 @@
            Table 1 Differences between Redis versions

            Feature

            Redis 4.0 and Redis 5.0

            Redis 6.0/7.0

            +

            Redis 6.0/7.0

            Single-node, master/standby, and Proxy Cluster

            Single-node, master/standby, Proxy Cluster, read/write splitting, and Redis Cluster

            +

            Single-node, read/write splitting, master/standby, Proxy Cluster, and Redis Cluster

            Single-node, master/standby, and Redis Cluster
            -

            Procedure

            1. Log in to the DCS console.
            2. Click in the upper left corner and select a region and a project.
            3. In the navigation pane, choose Cache Manager.
            1. Click the name of an instance.
            2. Choose Instance Configuration > Tags.

              View the tags of the instance.

              +

              Procedure

              1. Log in to the DCS console.
              2. Click in the upper left corner and select a region and a project.
              3. In the navigation pane, choose Cache Manager.
              1. Click the name of an instance.
              2. Choose Instance Configuration > Tags.

                View the tags of the instance.

              3. Perform the following operations as required:

                diff --git a/docs/dcs/umn/dcs-faq-0326022.html b/docs/dcs/umn/dcs-faq-0326022.html index 78501d852..d1818306c 100644 --- a/docs/dcs/umn/dcs-faq-0326022.html +++ b/docs/dcs/umn/dcs-faq-0326022.html @@ -4,7 +4,7 @@
                  -
                • Can DCS Redis Instances Be Upgraded, for Example, from Redis 4.0 to 5.0?
                  +
                • Can the Major Version of a DCS Redis Instance Be Upgraded, for Example, from Redis 4.0 to 5.0?
                • Are Services Interrupted If Maintenance is Performed During the Maintenance Time Window?
                  • diff --git a/docs/dcs/umn/dcs-faq-0427028.html b/docs/dcs/umn/dcs-faq-0427028.html new file mode 100644 index 000000000..8b77f2719 --- /dev/null +++ b/docs/dcs/umn/dcs-faq-0427028.html @@ -0,0 +1,14 @@ + + +

                  Does DCS for Redis Support Multi-DB?

                  +

                  DCS's support for multiple databases (multi-DB) is as follows:

                  +
                  • Single-node, read/write splitting, and master/standby DCS Redis instances: Multi-DB is supported. By default, there are 256 databases, numbering 0–255. The default database is DB0. Multi-DB is used for data isolation. The size of each database is not evenly allocated. As a result, one database may fully occupy the memory of the instance.
                  • Proxy Cluster: There is only one database by default. +
                  • Redis Cluster DCS instances: Multi-DB is not supported. There is only one database (DB0).
                  +

                  The number of databases cannot be changed, and the size of each database cannot be customized.

                  +
                  +
                  +
                  +
                  Parent topic: Redis Usage
                  +
                  +
                  + diff --git a/docs/dcs/umn/dcs-faq-0427070.html b/docs/dcs/umn/dcs-faq-0427070.html index fa4c9118d..1f88dd466 100644 --- a/docs/dcs/umn/dcs-faq-0427070.html +++ b/docs/dcs/umn/dcs-faq-0427070.html @@ -2,7 +2,7 @@

                  How Do I View Current Concurrent Connections and Maximum Connections of a DCS Redis Instance?

                  Viewing Concurrent Connections of a DCS Redis Instance

                  The number of connections received by a DCS instance is a metric that is monitored by Cloud Eye. For details on how to view metrics, see Viewing DCS Monitoring Metrics.

                  -

                  On the Cloud Eye console, find the Connected Clients metric. Click to view monitoring details on an enlarged graph.

                  +

                  On the Cloud Eye console, find the Connected Clients metric. Click to view monitoring details on an enlarged graph.

                  Specify a time range to view the metric in a specific monitoring period. For example, you can select a 10-minute period to view the number of connections received during the period. On the graph, you can view the trend and the total number of connections received during the period.

                  On the Cloud Eye console, you can also view other monitoring metrics of your DCS instances, for example:
                  • CPU Usage
                  • Memory Usage
                  • Used Memory
                  • Ops per Second
                  diff --git a/docs/dcs/umn/dcs-faq-0603001.html b/docs/dcs/umn/dcs-faq-0603001.html index 17407c219..8d9451960 100644 --- a/docs/dcs/umn/dcs-faq-0603001.html +++ b/docs/dcs/umn/dcs-faq-0603001.html @@ -2,10 +2,10 @@

                  Why Is the Rejected Connections Metric Displayed?

                  If the Rejected Connections metric is displayed, check if the number of connected clients exceeds the maximum allowed number of connections of the instances.

                  -

                  The Rejected Connections metric of data nodes can be checked only for master/standby, cluster, and read/write splitting DCS Redis 4.0/5.0/6.0 instances.

                  +

                  The Rejected Connections metric of data nodes can be checked only for master/standby, cluster, and read/write splitting DCS Redis 4.0 and later instances.

                  -
                  • To check the maximum number of connections, go to the Parameters tab page of the instance and check the maxclients metric. (Currently, read/write splitting instances do not have this parameter. To query the maximum connections of them, see .)
                  • To check the current number of connections, go to the Performance Monitoring tab page of the instance and check the Connected Clients metric.
                  -

                  If the current number of connections reaches the upper limit, you can adjust the value of maxclients. If the value of maxclients can no longer be increased, increase the instance specifications.

                  +
                  • To check the maximum number of connections, go to the Instance > Parameters tab page of the instance and check the maxclients metric. (Currently, read/write splitting instances do not have this parameter. To query the maximum connections of them, see DCS Instance Specifications.)
                  • To check the current number of connections, go to the Performance Monitoring tab page of the instance and check the Connected Clients metric.
                  +

                  If the current number of connections reaches the upper limit, you can adjust the value of maxclients. If the value of maxclients can no longer be increased, consider adding shards.

                  diff --git a/docs/dcs/umn/dcs-faq-0730006.html b/docs/dcs/umn/dcs-faq-0730006.html index ac0975f78..f8df86a35 100644 --- a/docs/dcs/umn/dcs-faq-0730006.html +++ b/docs/dcs/umn/dcs-faq-0730006.html @@ -7,6 +7,7 @@
                  1. Network

                    1. Check the IP address configurations.

                      Check whether the IP address configured on the Jedis client is the same as the subnet address configured for your DCS instance.

                    2. Test the network.

                      Use the ping command and telnet on the client to test the network.

                      • If the network cannot be pinged:

                        For intra-VPC access to a DCS Redis 3.0 instance, ensure that the client and your DCS instance belong to the same VPC and security group, or the security group of your DCS instance allows access through port 6379. For details, see Security Group Configurations.

                        +

                        For intra-VPC access to a DCS Redis instance, ensure that the client and your DCS instance belong to the same VPC.

                      • If the IP address can be pinged but telnet failed, restart your instance. If the problem persists after the restart, contact technical support.

                  2. Check the number of connections.

                    Check whether the number of established network connections exceeds the upper limit configured for the Jedis connection pool. If the number of established connections approaches the configured upper limit, restart the DCS service and check whether the problem persists. If the number of established connections is far below the upper limit, continue with the following checks.

                    diff --git a/docs/dcs/umn/dcs-faq-0730007.html b/docs/dcs/umn/dcs-faq-0730007.html index af56c1f5a..62175a37e 100644 --- a/docs/dcs/umn/dcs-faq-0730007.html +++ b/docs/dcs/umn/dcs-faq-0730007.html @@ -4,7 +4,7 @@

                    The possible causes are as follows:

                    1. The command is spelled incorrectly.

                      As shown in the following figure, the error message is returned because the correct command for deleting a string should be del.

                      -
                    2. A command available in a higher Redis version is run in a lower Redis version.

                      As shown in the following figure, the error message is returned because a stream command (available in Redis 5.0) is run in Redis 3.0.

                      +
                    3. A command available in a higher Redis version is run in a lower Redis version.

                      For example, the error message is returned because a stream command (available in Redis 5.0) is run in Redis 3.0.

                    4. Some commands are disabled.

                      DCS Redis instance interfaces are fully compatible with the open-source Redis in terms of data access. However, for ease of use and security purposes, some operations cannot be initiated through Redis clients. For details about disabled commands, see Command Compatibility.

                    diff --git a/docs/dcs/umn/dcs-faq-0730012.html b/docs/dcs/umn/dcs-faq-0730012.html index 851ec9171..a0fa4b852 100644 --- a/docs/dcs/umn/dcs-faq-0730012.html +++ b/docs/dcs/umn/dcs-faq-0730012.html @@ -4,6 +4,7 @@
                    • Possible cause 1:

                      The service QPS is so high that the CPU usage spikes to 100%.

                    • Possible cause 2:

                      You have run commands that consume a lot of resources, such as KEYS. This will make CPU usage spike and can easily trigger a master/standby switchover.

                      +
                    • Possible cause 3:

                      Redis rewrite was triggered, increasing CPU usage.

                    diff --git a/docs/dcs/umn/dcs-faq-0730019.html b/docs/dcs/umn/dcs-faq-0730019.html deleted file mode 100644 index 89f28d33c..000000000 --- a/docs/dcs/umn/dcs-faq-0730019.html +++ /dev/null @@ -1,12 +0,0 @@ - - -

                    Does DCS for Redis Support Multiple Databases?

                    -

                    Both single-node and master/standby DCS Redis instances support multiple databases. By default, single-node and master/standby DCS instances can read and write data in 256 databases (databases numbering 0–255). The default database is DB0.

                    -

                    Redis Cluster DCS instances do not support multi-DB. There is only one database (DB0).

                    -
                    -
                    -
                    -
                    Parent topic: Redis Usage
                    -
                    -
                    - diff --git a/docs/dcs/umn/dcs-faq-0730022.html b/docs/dcs/umn/dcs-faq-0730022.html index 1d9fb61ec..f24a85711 100644 --- a/docs/dcs/umn/dcs-faq-0730022.html +++ b/docs/dcs/umn/dcs-faq-0730022.html @@ -8,7 +8,6 @@

                  Viewing or Changing Eviction Policies

                  You can view or change the eviction policy with the maxmemory-policy parameter.

                  -

                  diff --git a/docs/dcs/umn/dcs-faq-0730026.html b/docs/dcs/umn/dcs-faq-0730026.html index 3d461f6a3..a6d123240 100644 --- a/docs/dcs/umn/dcs-faq-0730026.html +++ b/docs/dcs/umn/dcs-faq-0730026.html @@ -6,7 +6,7 @@
                • Redis 4.0 and later

                  You can specify a port (ranging from 1 to 65535) or use the default port (6379) for accessing an instance. If no port is specified, the default port will be used.

                If the instance and the client use different security groups, you must configure access rules for the security groups, allowing access through the specified port. For details, see Security Group Configurations.

                -

                Customizing a Port

                When creating a DCS Redis 4.0, 5.0, or 6.0 instance, you can enter a port number for IP Address. If you do not specify a port, the default port 6379 is used.

                +

                Customizing a Port

                When creating a DCS Redis 4.0 or later instance, you can enter a port for IP Address. If you do not specify a port, the default port 6379 is used.

                Changing the Port

                After a DCS Redis 4.0 or later instance is created, you can change its port.

                1. In the navigation pane of the DCS console, choose Cache Manager.
                2. Click a DCS Redis instance.
                3. In the Connection area, click next to Connection Address.

                  After the port is changed, all connections to the Redis instance are interrupted, and services are connected to the new port.

                  diff --git a/docs/dcs/umn/dcs-faq-0730043.html b/docs/dcs/umn/dcs-faq-0730043.html index 21c6d1bb1..91a51c1f3 100644 --- a/docs/dcs/umn/dcs-faq-0730043.html +++ b/docs/dcs/umn/dcs-faq-0730043.html @@ -1,8 +1,7 @@ -

                  Can DCS Redis Instances Be Upgraded, for Example, from Redis 4.0 to 5.0?

                  -

                  No. Different Redis versions use different underlying architectures. The Redis version used by a DCS instance cannot be changed once the instance is created. For example, you cannot change a DCS Redis 4.0 instance to Redis 5.0. However, you will be informed of any defects or problems found in Redis.

                  -

                  If your service requires the features of higher Redis versions, create a DCS Redis instance of a higher version and then migrate data from the original instance to the new one. For details on how to migrate data, see Migrating Data with DCS.

                  +

                  Can the Major Version of a DCS Redis Instance Be Upgraded, for Example, from Redis 4.0 to 5.0?

                  +

                  No. It is unavailable. Different Redis versions use different underlying architectures. The Redis version used by a DCS instance cannot be changed once the instance is created. For example, you cannot change a DCS Redis 4.0 instance to Redis 5.0. If your service requires the features of higher Redis versions, create a DCS Redis instance of a higher version and then migrate data from the original instance to the new one. For details on how to migrate data, see Migrating Data with DCS.

                  diff --git a/docs/dcs/umn/dcs-faq-0730058.html b/docs/dcs/umn/dcs-faq-0730058.html index e69e66cf3..95c707815 100644 --- a/docs/dcs/umn/dcs-faq-0730058.html +++ b/docs/dcs/umn/dcs-faq-0730058.html @@ -2,10 +2,10 @@

                  When Does a Master/Standby Switchover Occur?

                  A master/standby switchover may occur in the following scenarios:

                  -
                  • A master/standby switchover operation is initiated on the DCS Console.
                  • If the master node of a master/standby instance fails, a master/standby switchover will be triggered.

                    For example, running commands that consume a lot of resources, such as KEYS commands, will cause CPU usage to spike and as result triggers a master/standby switchover.

                    -
                  • If you restart a master/standby instance on the DCS console, a master/standby switchover will be triggered.
                  • If you scale up a single-node, read/write splitting, or master/standby instance, a master/standby switchover will be triggered.

                    During scale-up, a new standby node with the new specifications is created. After full and incremental data on the master node is synchronized to the standby node, a master/standby switchover is performed and the original node is deleted.

                    +
                    • A master/standby switchover operation is initiated on the DCS Console.
                    • If the master node of a master/standby instance fails, a master/standby switchover will be triggered.

                      For example, if commands (such as KEYS) that consume a lot of resources are used or logs are aged and deleted in batches, the CPU usage will surge, triggering a master/standby switchover.

                      +
                    • If you restart a master/standby instance on the DCS console, a master/standby switchover will be triggered.
                    • A master/standby switchover is triggered during Redis instance scale-out.

                      During scale-up, a new standby node with the new specifications is created. After full and incremental data on the master node is synchronized to the standby node, a master/standby switchover is performed and the original node is deleted.

                    -

                    After a master/standby switchover occurs, you will receive a notification. Check whether the client services are running properly. If not, check whether the TCP connection is normal and whether it can be re-established after the master/standby switchover to restore the services.

                    +

                    To monitor master/standby switchovers of instances, create event monitoring on Cloud Eye. Then, the system reports master/standby switchovers based on event alarm rules. Check whether the client services are abnormal if needed. If the services are abnormal, check whether the client connections are normal, and whether client connections can be retried after master/standby switchovers. Restart the client if the connections cannot be retried.

                  diff --git a/docs/dcs/umn/dcs-faq-210804001.html b/docs/dcs/umn/dcs-faq-210804001.html new file mode 100644 index 000000000..b19bbd793 --- /dev/null +++ b/docs/dcs/umn/dcs-faq-210804001.html @@ -0,0 +1,21 @@ + + +

                  Notes and Procedure for Enabling Multi-DB for Proxy Cluster Instances

                  +

                  Note the following constraints when you consider implementing multi-DB:

                  +
                  • Usage constraints:
                    1. The SWAPDB command does not support multi-DB.
                    2. The INFO KEYSPACE command does not return data of multi-DB.
                    3. To query the total number of keys in each database, use the customized dbstats command. CPU usage will surge on the node executing this command.
                    4. LUA scripts do not support multi-DB.
                    5. The RANDOMKEY command does not support multi-DB.
                    6. PUBLISH cannot be used in Lua scripts.
                    7. The database number ranges from 0 to 255.
                    8. Proxy Cluster DCS Redis 3.0 instances do not support multi-DB.
                    +
                  • Performance constraints
                    1. The FLUSHDB command deletes keys one by one, which takes a long time and is slower than the open-source native implementation. The execution speed of the FLUSHDB command is the same as that of the SCAN command (which should be tested by the customer).
                    2. The DBSIZE command is time-consuming. Do not use it in the code.
                    3. If multi-DB is used, the performance of the KEYS and SCAN commands deteriorates by up to 50%.
                    +
                  • Other constraints:

                    The backend storage rewrites keys based on certain rules. Keys in the exported RDB file are not the original keys. However, the access through the Redis protocol is not affected.

                    +
                  +

                  Procedure for Enabling or Disabling Multi-DB

                  By default, a Proxy Cluster instance is not enabled with multi-DB, but you can do as follows to enable multi-DB.

                  +
                  1. Log in to the DCS console.
                  2. Connect to the instance and run the FLUSHALL command to clear the instance data.

                    Before enabling or disabling multi-DB, ensure that all instance data is cleared and no data is being written.

                    +
                    +

                  3. On the Cache Manager page of the DCS console, click the desired DCS instance.
                  4. Choose Instance Configuration > Parameters.
                  5. To enable multi-DB, click Modify in the row that contains parameter multi-db, and change its value to yes.

                    To disable multi-DB, change the value to no.

                    +

                  6. Click Save and then confirm the modification. The instance does not need to be restarted.
                  +
                  +
                  +
                  +
                  +
                  Parent topic: Redis Usage
                  +
                  +
                  + diff --git a/docs/dcs/umn/dcs-faq-221222.html b/docs/dcs/umn/dcs-faq-221222.html index 086556022..55129af27 100644 --- a/docs/dcs/umn/dcs-faq-221222.html +++ b/docs/dcs/umn/dcs-faq-221222.html @@ -2,7 +2,7 @@

                  Is the Read-only Address of a Master/Standby Instance Connected to the Master or Standby Node?

                  A master/standby DCS Redis 4.0 or later instance has a Connection Address and a Read-only Address. The connection address is used to connect to the master node of the instance, and the read-only address is used to connect to the standby node of the instance.

                  -

                  For details, see Architecture of Master/Standby DCS Redis Instances.

                  +

                  For more information, see Architecture of Master/Standby DCS Redis Instances.

                  Figure 1 Instance addresses

                  By default, the client reads and writes data on the master node. Data is synchronized to the standby node. To implement read/write splitting, ensure that your client can distinguish between read and write requests. The client directs write requests to the read/write domain name and read requests to the read-only domain name.

                  diff --git a/docs/dcs/umn/dcs-migrate-0220411.html b/docs/dcs/umn/dcs-migrate-0220411.html index aab6f68d4..ea9e49eb4 100644 --- a/docs/dcs/umn/dcs-migrate-0220411.html +++ b/docs/dcs/umn/dcs-migrate-0220411.html @@ -24,36 +24,36 @@ vi nginx.conf
                4. Example forwarding configuration:
                  stream {
     server {
         listen 6379;
-        proxy_pass {source_instance_address}:{port};
+        proxy_pass {source_instance_address}:{port};
     }
    }

                  6379 is the listening port of the source forwarding server. {source_instance_address} and {port} are the connection address and port of the source Redis instance.

                  This configuration allows you to access the source Redis through the local listening port 6379 of the source forwarding server.

                  This configuration must be added exactly where it is shown in the following figure.

                  -
                  Figure 2 Configuration location
                  +
                  Figure 2 Configuration location 1
                5. Restart Nginx.
                  service nginx restart
                6. Verify whether Nginx has been started.
                  netstat -an|grep 6379

                  If the port is being listened, Nginx has been started successfully.

                  -
                  Figure 3 Verification result
                  +
                  Figure 3 Verification result 1

              4. Configure Nginx forwarding for the ECS.

                1. Log in to the Linux ECS and run the following commands to open and modify the configuration file:
                  cd /etc/nginx
 vi nginx.conf
                2. Configuration example:
                  stream {
     server {
         listen 6666;
-        proxy_pass {source_ecs_address}:6379;
+        proxy_pass {source_ecs_address}:6379;
     }
    }

                  6666 is ECS's listening port, {source_ecs_address} is the public IP address of the source forwarding server, and 6379 is the listening port of the source forwarding server Nginx.

                  This configuration allows you to access the source forwarding server through the local listening port 6666 of the ECS.

                  This configuration must be added exactly where it is shown in the following figure.

                  -
                  Figure 4 Configuration location
                  +
                  Figure 4 Configuration location 2
                3. Restart Nginx.
                  service nginx restart
                4. Verify whether Nginx has been started.
                  netstat -an|grep 6666

                  If the port is being listened, Nginx has been started successfully.

                  -
                  Figure 5 Verification result
                  +
                  Figure 5 Verification result 2
                -

              5. Run the following command on the ECS to test the network connection of port 6666:

                redis-cli -h {target_ecs_address} -p 6666 -a {password}
                +

              6. Run the following command on the ECS to test the network connection of port 6666:

                redis-cli -h {target_ecs_address} -p 6666 -a {password}

                {target_ecs_address} is the EIP of the ECS, 6666 is the listening port of the ECS, and {password} is the source Redis password. If there is no password, leave it blank.

                Figure 6 Connection example

              7. Prepare the migration tool redis-shake.

                1. Log in to the ECS.
                2. Download redis-shake on the ECS. Version 2.0.3 is used as an example. You can use other redis-shake versions as required.
                  wget https://github.com/tair-opensource/RedisShake/releases/download/release-v2.0.3-20200724/redis-shake-v2.0.3.tar.gz
                  @@ -77,7 +77,7 @@ vi nginx.conf
                  Figure 8 Migration result

                3. After the migration is complete, use redis-cli to connect to the source and target Redis instances to check whether the data is complete.

                  1. Connect to the source and target Redis instances, respectively.

                    For details, see Accessing a DCS Redis Instance Through redis-cli.

                  2. Run the info keyspace command to check the values of keys and expires.
                  3. Calculate the differences between the values of keys and expires of the source Redis and the target Redis. If the differences are the same, the data is complete and the migration is successful.
                  -

                4. Delete the redis-shake configuration file.
                +

              8. After the verification is complete, you are advised to clear the redis-shake configuration in time.
            diff --git a/docs/dcs/umn/dcs-migrate-1117003.html b/docs/dcs/umn/dcs-migrate-1117003.html index c20ec51c0..df21157aa 100644 --- a/docs/dcs/umn/dcs-migrate-1117003.html +++ b/docs/dcs/umn/dcs-migrate-1117003.html @@ -8,31 +8,31 @@

            Prerequisites

            • A DCS Redis instance has been created. Note that the memory of the DCS Redis Cluster instance cannot be smaller than that of the source cluster.
            • An ECS has been created for running redis-shake. The ECS must use the same VPC, subnet, and security group as the Redis instance.
            -

            Procedure

            1. Access the target Redis instance using redis-cli. Obtain the IP address and port of the master node of the target instance.
              redis-cli -h {target_redis_address} -p {target_redis_port} -a {target_redis_password} cluster nodes
              +

              Procedure

              1. Access the target Redis instance using redis-cli. Obtain the IP address and port of the master node of the target instance.
                redis-cli -h {target_redis_address} -p {target_redis_port} -a {target_redis_password} cluster nodes
                • {target_redis_address}: connection address of the target DCS Redis instance.
                • {target_redis_port}: port of the target DCS Redis instance.
                • {target_redis_password}: password for connecting to the target DCS Redis instance.

                In the command output similar to the following, obtain the IP addresses and ports of all masters.

              2. Install redis-shake on the prepared ECS.
                1. Log in to the ECS.
                2. Download redis-shake on the ECS. Version 2.0.3 is used as an example. You can use other redis-shake versions as required.
                  wget https://github.com/tair-opensource/RedisShake/releases/download/release-v2.0.3-20200724/redis-shake-v2.0.3.tar.gz
                3. Decompress the redis-shake file.
                  tar -xvf redis-shake-v2.0.3.tar.gz
                  +

                  If the source Redis is deployed in the data center intranet, install redis-shake on the intranet server. Export data and then upload the data to the cloud server as instructed by the following steps.

                -

                If the source Redis is deployed in the data center intranet, install redis-shake on the intranet server. Export data and then upload the data to the cloud server as instructed by the following steps.

                -
              3. Export the RDB file from the source Redis console. If the RDB file cannot be exported, contact customer service of the source.
              4. Import the RDB file.
                1. Import the RDB file (or files) to the cloud server. The cloud server must be connected to the target DCS instance.
                2. Edit the redis-shake configuration file redis-shake.conf.
                  vim redis-shake.conf
                  Add the following information about all the masters of the target:
                  target.type = cluster
 # If there is no password, skip the following parameter.
-target.password_raw = {target_redis_password}
+target.password_raw = {target_redis_password}
 # IP addresses and port numbers of all masters of the target instance, which are separated by semicolons (;).
 target.address = {master1_ip}:{master1_port};{master2_ip}:{master2_port}...{masterN_ip}:{masterN_port}
 # List the RDB files to be imported, separated by semicolons (;).
-rdb.input = {local_dump.0};{local_dump.1};{local_dump.2};{local_dump.3}
                  +rdb.input = {local_dump.0};{local_dump.1};{local_dump.2};{local_dump.3}

                  Press Esc to exit the editing mode and enter :wq!. Press Enter to save the configuration and exit the editing interface.

                3. Run the following command to import the RDB file to the target instance:
                  ./redis-shake -type restore -conf redis-shake.conf

                  If the following information is displayed in the execution log, the backup file is imported successfully:

                  Enabled http stats, set status (incr), and wait forever.
                -
              5. Verify the migration.

                After data synchronization, access the target Redis Cluster DCS instance using redis-cli. Run the info command to query the number of keys in the Keyspace section to confirm that data has been fully imported.

                -

                If the data has not been fully imported, run the flushall or flushdb command to clear the cached data in the instance, and synchronize data again.

                +
              6. Verify the migration.

                Before data migration, if the target Redis has no data, check data integrity after the migration is complete in the following way:

                +
                1. Connect to the source Redis and the target Redis. Connect to Redis by referring to Accessing a DCS Redis Instance Through redis-cli.
                2. Run the info keyspace command to check the values of keys and expires.

                  +
                3. Calculate the differences between the values of keys and expires of the source Redis and the target Redis. If the differences are the same, the data is complete and the migration is successful.
            diff --git a/docs/dcs/umn/dcs-migrate-demo02.html b/docs/dcs/umn/dcs-migrate-demo02.html index a443c154e..5621b2384 100644 --- a/docs/dcs/umn/dcs-migrate-demo02.html +++ b/docs/dcs/umn/dcs-migrate-demo02.html @@ -9,41 +9,46 @@
            • An Elastic Cloud Server (ECS) has been created. For details about how to create an ECS, see Elastic Cloud Server User Guide.

              Select the same VPC, subnet, and security group as the DCS Redis Cluster instance, and bind EIPs to the ECS.

            • If the source self-hosted Redis Cluster is deployed on cloud servers of another cloud, allow public access to the servers.
        -

        Obtaining Information of the Source and Target Redis Nodes

        1. Connect to the source and target Redis instances, respectively. Connect to Redis by referring to Accessing a DCS Redis Instance Through redis-cli.
        2. In online migration of Redis Clusters, the migration must be performed node by node. Run the following command to query the IP addresses and ports of all nodes in both the source and target Redis Clusters.
          redis-cli -h {redis_address} -p {redis_port} -a {redis_password} cluster nodes
          +

          Obtaining Information of the Source and Target Redis Nodes

          1. Connect to the source and target Redis instances, respectively. Connect to Redis by referring to Accessing a DCS Redis Instance Through redis-cli.
          2. In online migration of Redis Clusters, the migration must be performed node by node. Run the following command to query the IP addresses and ports of all nodes in both the source and target Redis Clusters.
            redis-cli -h {redis_address} -p {redis_port} -a {redis_password} cluster nodes

            {redis_address} indicates the Redis connection address, {redis_port} indicates the Redis port, and {redis_password} indicates the Redis connection password.

            -

            In the command output similar to the following, obtain the IP addresses and ports of all masters.

            +

            In the output, obtain the IP addresses and ports of all the master nodes.

          -

          Configuring the redis-shake Tool

          1. Log in to the ECS.
          2. Run the following command on the ECS to download the redis-shake: This section uses v2.1.2 as an example. You can also download other redis-shake versions as required.
            wget https://github.com/tair-opensource/RedisShake/releases/download/release-v2.1.2-20220329/release-v2.1.2-20220329.tar.gz
            -
          3. Decompress the redis-shake file.
            tar -xvf redis-shake-v2.1.2.tar.gz
            +

            Configuring the redis-shake Tool

            1. Log in to the ECS.
            2. Run the following command on the ECS to download the redis-shake: This section uses v4.3.2 as an example. You can also download other redis-shake versions as required.
              wget https://github.com/tair-opensource/RedisShake/releases/download/v4.3.2/redis-shake-v4.3.2-linux-amd64.tar.gz
              +
            3. Decompress the redis-shake file.
              mkdir redis-shake-v4.3.2
+tar -C redis-shake-v4.3.2 -xzvf redis-shake-v4.3.2-linux-amd64.tar.gz

              -
            4. Go to the redis-shake directory.
              cd redis-shake-v2.0.3
              -
            5. Edit the redis-shake.conf file by providing the following information about all the masters of both the source and the target:
              vim redis-shake.conf
              -
              The modification is as follows:
              source.type = cluster
-# If there is no password, skip the following parameter.
-source.password_raw = {source_redis_password}
-# IP addresses and port numbers of all masters of the source Redis Cluster, which are separated by semicolons (;).
-source.address = {master1_ip}:{master1_port};{master2_ip}:{master2_port}...{masterN_ip}:{masterN_port}
-target.type = cluster
-# If there is no password, skip the following parameter.
-target.password_raw = {target_redis_password}
-# IP addresses and port numbers of all masters of the target instance, which are separated by semicolons (;).
-target.address = {master1_ip}:{master1_port};{master2_ip}:{master2_port}...{masterN_ip}:{masterN_port}
              +
            6. Go to the decompressed directory.
              cd redis-shake-v4.3.2
              +
            7. Edit the shake.toml file by providing the following information of both the source and the target.
              vim shake.toml
              +
              The modification is as follows:
              [sync_reader]
+# If the source instance type is a Redis Cluster, set the value to true.
+cluster = true
+# IP address and port of any node in the source Redis Cluster
+address = {redis_ip}:{redis_port}
+# If there is no password, skip the following parameter      
+password = {source_redis_password}
+[redis_writer]
+# If the target instance type is a Redis Cluster, set the value to true.
+cluster = true
+# IP address and port of any node in the target Redis Cluster
+address = {redis_ip}:{redis_port}
+# If there is no password, skip the following parameter      
+password = {target_redis_password}

              Press Esc to exit the editing mode and enter :wq!. Press Enter to save the configuration and exit the editing interface.

            -

            Migrating Data Online

            Run the following command to synchronize data between the source and the target Redis:
            ./redis-shake -type sync -conf redis-shake.conf
            +

            Migrating Data Online

            Run the following command to synchronize data between the source and the target Redis:
            ./redis-shake shake.toml

            If the following information is displayed, the full synchronization has been completed and incremental synchronization begins.

            -
            sync rdb done.
            +
            syncing aof

            If the following information is displayed, no new data is incremented. You can stop the incremental synchronization by pressing Ctrl+C.

            -
            sync:  +forwardCommands=0  +filterCommands=0  +writeBytes=0
            +
            write_ops=[0.00], src-*, syncing aof, diff=[0]
            Figure 1 Online migration using redis-shake

            Verifying the Migration

            1. After the data synchronization, connect to the Redis Cluster DCS instance by referring to Accessing a DCS Redis Instance Through redis-cli.
            2. Run the info command to check whether the data has been successfully imported as required.

              If the data has not been fully imported, run the flushall or flushdb command to clear the cached data in the target instance, and migrate data again.

              -
            3. After the verification is complete, delete the redis shake configuration file.
            +
          4. After the verification is complete, you are advised to clear the redis-shake configuration in time.
        diff --git a/docs/dcs/umn/dcs-migrate-demo03.html b/docs/dcs/umn/dcs-migrate-demo03.html index c85fc0c18..f4caac555 100644 --- a/docs/dcs/umn/dcs-migrate-demo03.html +++ b/docs/dcs/umn/dcs-migrate-demo03.html @@ -1,29 +1,27 @@

        Self-Hosted Redis Cluster Migration with redis-shake (RDB)

        -

        redis-shake is an open-source tool for migrating data online or offline (by importing backup files) between Redis Clusters. Data can be migrated to DCS Redis Cluster instances seamlessly because DCS Redis Cluster inherits the native Redis Cluster design.

        +

        redis-shake is an open-source tool for migrating data online or offline (by importing backup files) between Redis Clusters. Data can be migrated to DCS Redis Cluster instances seamlessly because DCS Redis Cluster inherits the native Redis Cluster design. If the source Redis and the target Redis cannot be connected, or the source Redis is deployed on other clouds, you can migrate data by importing backup files.

        The following describes how to use Linux redis-shake to migrate self-hosted Redis Cluster to a DCS Redis Cluster instance offline.

        -

        If the source Redis and the target Redis cannot be connected, or the source Redis is deployed on other clouds, you can migrate data by importing backup files.

        -

        Notes and Constraints

        To migrate to an instance with SSL enabled, disable the SSL setting first. For details, see Transmitting DCS Redis Data with Encryption Using SSL.

        Prerequisites

        • A DCS Redis Cluster instance has been created. For details about how to create one, see Creating a DCS Redis Instance.

          The memory of the target Redis instance cannot be smaller than that of the source Redis.

          -
        • An Elastic Cloud Server (ECS) has been created. For details about how to create an ECS, see Elastic Cloud Server User Guide. Select the same VPC, subnet, and security group as the DCS Redis Cluster instance.
        +
      6. An Elastic Cloud Server (ECS) has been created. For details about how to create an ECS, see Elastic Cloud Server User Guide. Select the same VPC, subnet, and security group as the DCS Redis Cluster instance.
    -

    Obtaining Information of the Source and Target Redis Nodes

    1. Connect to the source and target Redis instances, respectively. Connect to Redis by referring to Accessing a DCS Redis Instance Through redis-cli.
    2. In online migration of Redis Clusters, the migration must be performed node by node. Run the following command to query the IP addresses and ports of all nodes in both the source and target Redis Clusters.
      redis-cli -h {redis_address} -p {redis_port} -a {redis_password} cluster nodes
      +

      Obtaining Information of the Source and Target Redis Nodes

      1. Connect to the source and target Redis instances, respectively. Connect to Redis by referring to Accessing a DCS Redis Instance Through redis-cli.
      2. In online migration of Redis Clusters, the migration must be performed node by node. Run the following command to query the IP addresses and ports of all nodes in both the source and target Redis Clusters.
        redis-cli -h {redis_address} -p {redis_port} -a {redis_password} cluster nodes

        {redis_address} indicates the Redis connection address, {redis_port} indicates the Redis port, and {redis_password} indicates the Redis connection password.

        -

        In the command output similar to the following, obtain the IP addresses and ports of all masters.

        +

        In the output, obtain the IP addresses and ports of all the master nodes.

      Installing RedisShake

      1. Log in to the ECS.
      2. Run the following command on the ECS to download the redis-shake: This section uses v2.1.2 as an example. You can also download other redis-shake versions as required.
        wget https://github.com/tair-opensource/RedisShake/releases/download/release-v2.1.2-20220329/release-v2.1.2-20220329.tar.gz
        -
      3. Decompress the redis-shake file.
        tar -xvf redis-shake-v2.1.2.tar.gz
        +
      4. Decompress the redis-shake file.
        tar -xvf release-v2.1.2-20220329.tar.gz

        +

        If the source cluster is deployed in the data center intranet, install redis-shake on the intranet server. Export the source cluster backup file by referring to Exporting the Backup File. Upload the backup to the ECS.

      -

      If the source cluster is deployed in the data center intranet, install redis-shake on the intranet server. Export the source cluster backup file by referring to Exporting the Backup File. Upload the backup to the cloud server as instructed by the following steps

      -
      -

      Exporting the Backup File

      1. Go to the redis-shake directory.
        cd redis-shake-v2.0.3
        +

        Exporting the Backup File

        1. Go to the redis-shake directory.
          cd bin
          +

        2. Edit the redis-shake.conf file by providing the following information about all the masters of the source:
          vim redis-shake.conf
          The modification is as follows:
          source.type = cluster
 # If there is no password, skip the following parameter.
@@ -53,7 +51,7 @@ rdb.input = {local_dump.0};

        Verifying the Migration

        1. After the data synchronization, connect to the Redis Cluster DCS instance by referring to Accessing a DCS Redis Instance Through redis-cli.
        2. Run the info command to check whether the data has been successfully imported as required.

          If the data has not been fully imported, run the flushall or flushdb command to clear the cached data in the target instance, and migrate data again.

          -
        3. After the verification is complete, delete the redis shake configuration file.
        +
      2. After the verification is complete, you are advised to clear the redis-shake configuration in time.
    diff --git a/docs/dcs/umn/dcs-migration-0312001.html b/docs/dcs/umn/dcs-migration-0312001.html index 70115e654..3b4e2f22f 100644 --- a/docs/dcs/umn/dcs-migration-0312001.html +++ b/docs/dcs/umn/dcs-migration-0312001.html @@ -160,7 +160,7 @@

    Whitelist or security group

    -

    DCS Redis 3.0, 4.0, 5.0, and 6.0 professional edition instances are deployed in different modes. Therefore, the access control methods vary. You can control access to your DCS instances by setting security groups or whitelists. For details, see How Do I Configure a Security Group? or Managing IP Address Whitelist.

    +

    DCS Redis instances of various versions are deployed in different modes. Therefore, the access control methods vary. You can control access to your DCS instances by setting security groups or whitelists. For details, see How Do I Configure a Security Group? or Managing IP Address Whitelist.

    ...

    diff --git a/docs/dcs/umn/dcs-migration-0312003.html b/docs/dcs/umn/dcs-migration-0312003.html index 488e7cd93..ba01e7d90 100644 --- a/docs/dcs/umn/dcs-migration-0312003.html +++ b/docs/dcs/umn/dcs-migration-0312003.html @@ -2,19 +2,16 @@

    Online Migration Between Instances

    If the source and target instances are interconnected and the SYNC and PSYNC commands are supported by the source instance, data can be migrated online in full or incrementally from the source to the target.

    -

    During online migration, data is essentially synchronized in full to a new replica. Therefore, perform online migration during low-demand hours. Otherwise, source instance CPU usage may surge and latency may increase.

    -
    -

    Notes and Constraints

    • You cannot use public networks for online migration.
    • Before migrating data, read through Migration Solution Notes to learn about the DCS data migration function and select an appropriate target instance.
    • Migrating a later Redis instance to an earlier one may fail.
    • For earlier instances whose passwords contain single quotation marks ('), modify the password for online migration or try other methods.
    • By default, a cluster instance has only one DB (DB0). Before you migrate data from a multi-DB single-node or master/standby instance to a Redis Cluster instance, check whether any data exists on databases other than DB0. To ensure that the migration succeeds, move all data to DB0 by referring to Online Migration with Rump.
    • During online migration, you are advised to set repl-timeout on the source instance to 300s and client-output-buffer-slave-hard-limit and client-output-buffer-slave-soft-limit to 20% of the maximum memory of the instance.
    • To migrate to an instance with SSL enabled, disable the SSL setting first. For details, see Transmitting DCS Redis Data with Encryption Using SSL.
    +

    Notes and Constraints

    • You cannot use public networks for online migration.
    • Migrating a later Redis instance to an earlier one may fail.
    • For earlier instances whose passwords contain single quotation marks ('), modify the password for online migration or try other methods.
    • By default, a cluster instance has only one DB (DB0). Before you migrate data from a multi-DB single-node or master/standby instance to a Redis Cluster instance, check whether any data exists on databases other than DB0. To ensure that the migration succeeds, move all data to DB0 by referring to Online Migration from Another Cloud Using Rump.
    • During online migration, you are advised to set repl-timeout on the source instance to 300s and client-output-buffer-slave-hard-limit and client-output-buffer-slave-soft-limit to 20% of the maximum memory of the instance.
    • To migrate to an instance with SSL enabled, disable the SSL setting first. For details, see Transmitting DCS Redis Data with Encryption Using SSL.
    • During online migration, data is essentially synchronized in full to a new replica. Therefore, perform online migration during low-demand hours. Otherwise, source instance CPU usage may surge and latency may increase.
    -

    Prerequisites