doc-exports/docs/dds/umn/CLASS.TXT.json

[
	{
		"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":"dds",
		"title":"Introduction",
		"uri":"en-us_topic_user_guide.html",
		"doc_type":"usermanual",
		"p_code":"",
		"code":"1"
	},
	{
		"desc":"Document Database Service (DDS) is compatible with MongoDB and is secure, highly available, reliable, scalable, and easy to use. It provides DB instance creation, scaling",
		"product_code":"dds",
		"title":"What Is DDS?",
		"uri":"en-us_topic_introduction.html",
		"doc_type":"usermanual",
		"p_code":"1",
		"code":"2"
	},
	{
		"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":"dds",
		"title":"System Architecture",
		"uri":"dds_01_0021.html",
		"doc_type":"usermanual",
		"p_code":"1",
		"code":"3"
	},
	{
		"desc":"Each DDS cluster is an independent document database. A sharded cluster consists of mongos, config, and shard.Data read and write requests are forwarded by mongos. A mong",
		"product_code":"dds",
		"title":"Cluster Architecture",
		"uri":"dds_01_0011.html",
		"doc_type":"usermanual",
		"p_code":"3",
		"code":"4"
	},
	{
		"desc":"A replica set consists of a set of mongod processes and provides a collection of data nodes to ensure data redundancy and reliability.For details about the mongod process",
		"product_code":"dds",
		"title":"Replica Set Architecture",
		"uri":"dds_01_0012.html",
		"doc_type":"usermanual",
		"p_code":"3",
		"code":"5"
	},
	{
		"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":"dds",
		"title":"Basic Concepts",
		"uri":"dds_01_0001.html",
		"doc_type":"usermanual",
		"p_code":"1",
		"code":"6"
	},
	{
		"desc":"DDS cluster instances consist of mongos, config, and shard nodes. The following diagram shows the node relationships.A mongos is a router for reading and writing data, pr",
		"product_code":"dds",
		"title":"Cluster",
		"uri":"dds_01_0002.html",
		"doc_type":"usermanual",
		"p_code":"6",
		"code":"7"
	},
	{
		"desc":"A database parameter group is a collection of configuration parameters and values and can be applied to multiple DB instances.",
		"product_code":"dds",
		"title":"Database Parameter Group",
		"uri":"dds_01_0005.html",
		"doc_type":"usermanual",
		"p_code":"6",
		"code":"8"
	},
	{
		"desc":"A region is a geographic area in which resources used by DDS are located.Each region comprises one or more AZs and is completely isolated from other regions. AZs within t",
		"product_code":"dds",
		"title":"Regions and AZs",
		"uri":"dds_01_0027.html",
		"doc_type":"usermanual",
		"p_code":"6",
		"code":"9"
	},
	{
		"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":"dds",
		"title":"Product Advantages",
		"uri":"dds_01_0006.html",
		"doc_type":"usermanual",
		"p_code":"1",
		"code":"10"
	},
	{
		"desc":"The three-node replica set architecture of DDS ensures high service availability.In a replica set, both the primary and secondary nodes provide services. If a primary nod",
		"product_code":"dds",
		"title":"High Reliability",
		"uri":"dds_01_0007.html",
		"doc_type":"usermanual",
		"p_code":"10",
		"code":"11"
	},
	{
		"desc":"DDS uses Virtual Private Clouds (VPCs) and network security groups to isolate your DB instances. VPCs allow you to configure IP address ranges that are allowed access to ",
		"product_code":"dds",
		"title":"High Security",
		"uri":"dds_01_0008.html",
		"doc_type":"usermanual",
		"p_code":"10",
		"code":"12"
	},
	{
		"desc":"You can create a DB instance on the management console and access DDS through an Elastic Cloud Server (ECS) to reduce the application response time. If you need to access",
		"product_code":"dds",
		"title":"Ease of Use",
		"uri":"dds_01_0010.html",
		"doc_type":"usermanual",
		"p_code":"10",
		"code":"13"
	},
	{
		"desc":"DDS supports the cluster mode. You can select multiple mongos and shards. When your service changes or the current instance configuration cannot meet the application perf",
		"product_code":"dds",
		"title":"Scalability",
		"uri":"dds_01_0009.html",
		"doc_type":"usermanual",
		"p_code":"10",
		"code":"14"
	},
	{
		"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":"dds",
		"title":"DDS DB Instance",
		"uri":"dds_01_0013.html",
		"doc_type":"usermanual",
		"p_code":"1",
		"code":"15"
	},
	{
		"desc":"DB instance specifications are listed in the following table.DB instance specifications vary depending on the actual environment.For details about the cluster instance sp",
		"product_code":"dds",
		"title":"DB Instance Specifications",
		"uri":"dds_01_0024.html",
		"doc_type":"usermanual",
		"p_code":"15",
		"code":"16"
	},
	{
		"desc":"Currently, DDS is compatible with MongoDB 3.2 and 3.4 Community Edition and supports the WiredTiger storage engine, so you need to use a driver compatible with MongoDB 3.",
		"product_code":"dds",
		"title":"Database Engine and Version",
		"uri":"dds_01_0014.html",
		"doc_type":"usermanual",
		"p_code":"15",
		"code":"17"
	},
	{
		"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":"dds",
		"title":"Database Status",
		"uri":"dds_01_0026.html",
		"doc_type":"usermanual",
		"p_code":"15",
		"code":"18"
	},
	{
		"desc":"Mobile Apps and MapsDDS supports two-dimensional space indexes for mobile applications (Apps) and maps that have location query requests. In addition, the dynamic storage",
		"product_code":"dds",
		"title":"Typical Application Scenarios",
		"uri":"dds_01_0015.html",
		"doc_type":"usermanual",
		"p_code":"1",
		"code":"19"
	},
	{
		"desc":"ECS provides DDS with elastic computing resources. DDS needs to apply for resources from ECS to build a running environment for DB instances.For more information, see the",
		"product_code":"dds",
		"title":"Related Services",
		"uri":"dds_01_0016.html",
		"doc_type":"usermanual",
		"p_code":"1",
		"code":"20"
	},
	{
		"desc":"DDS provides two types of user permissions by default: user management and resource management.User management refers to the management of users, user groups, and user gr",
		"product_code":"dds",
		"title":"User Permissions",
		"uri":"dds_01_0017.html",
		"doc_type":"usermanual",
		"p_code":"1",
		"code":"21"
	},
	{
		"desc":"You have registered an account.For the first time you use DDS, register an account at the official website. After the registration, your account has permissions to access",
		"product_code":"dds",
		"title":"Logging In to the DDS Console",
		"uri":"dds_02_0043.html",
		"doc_type":"usermanual",
		"p_code":"",
		"code":"22"
	},
	{
		"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":"dds",
		"title":"Getting Started with Clusters",
		"uri":"dds_02_cluster.html",
		"doc_type":"usermanual",
		"p_code":"",
		"code":"23"
	},
	{
		"desc":"This section describes how to create a cluster instance, set a security group, and connect to a cluster instance.Users who create the DDS DB instance for the first time.U",
		"product_code":"dds",
		"title":"Service Process",
		"uri":"dds_02_0003.html",
		"doc_type":"usermanual",
		"p_code":"23",
		"code":"24"
	},
	{
		"desc":"To improve the stability and security of DB instances, there are some restrictions on the use of DDS. For details, see Table 1.",
		"product_code":"dds",
		"title":"Restrictions",
		"uri":"dds_02_0002.html",
		"doc_type":"usermanual",
		"p_code":"23",
		"code":"25"
	},
	{
		"desc":"This section describes how to create a DDS cluster instance of Community Edition on the DDS management console. DDS allows you to tailor your computing resources and stor",
		"product_code":"dds",
		"title":"Creating a Cluster Instance",
		"uri":"dds_02_0008.html",
		"doc_type":"usermanual",
		"p_code":"23",
		"code":"26"
	},
	{
		"desc":"This section guides you on how to add a security group rule to control access from and to DDS DB instances in a security group.You can access a DDS DB instance in either ",
		"product_code":"dds",
		"title":"Setting a Security Group",
		"uri":"dds_02_0005.html",
		"doc_type":"usermanual",
		"p_code":"23",
		"code":"27"
	},
	{
		"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":"dds",
		"title":"Connecting to a Cluster Instance",
		"uri":"dds_02_0009.html",
		"doc_type":"usermanual",
		"p_code":"23",
		"code":"28"
	},
	{
		"desc":"You can access DDS through a private IP address or an EIP. The application scenario of the connection address is as follows:Use a private IP address when:DDS provides a p",
		"product_code":"dds",
		"title":"Binding and Unbinding an EIP",
		"uri":"dds_02_0006.html",
		"doc_type":"usermanual",
		"p_code":"28",
		"code":"29"
	},
	{
		"desc":"DDS allows you to use SSL to encrypt connections to a DB instance to protect your data.If SSL is enabled, you can connect to a database using SSL. For details, see SSL Co",
		"product_code":"dds",
		"title":"Enabling or Disabling SSL",
		"uri":"dds_02_0007.html",
		"doc_type":"usermanual",
		"p_code":"28",
		"code":"30"
	},
	{
		"desc":"This section guides you on how to connect to DB instances through a database client using a common connection or an SSL connection. You are advised to use SSL to encrypt ",
		"product_code":"dds",
		"title":"Connecting to a DB Instance Through a Client",
		"uri":"en-us_topic_0044018334.html",
		"doc_type":"usermanual",
		"p_code":"28",
		"code":"31"
	},
	{
		"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":"dds",
		"title":"Getting Started with Replica Sets",
		"uri":"dds_02_replica_set.html",
		"doc_type":"usermanual",
		"p_code":"",
		"code":"32"
	},
	{
		"desc":"This section describes how to create a replica set instance, set a security group, and connect to a replica set instance.Users who create the DDS DB instance for the firs",
		"product_code":"dds",
		"title":"Service Process",
		"uri":"dds_02_0010.html",
		"doc_type":"usermanual",
		"p_code":"32",
		"code":"33"
	},
	{
		"desc":"To improve the stability and security of DB instances, there are some restrictions on the use of DDS. For details, see Table 1.",
		"product_code":"dds",
		"title":"Restrictions",
		"uri":"dds_02_0011.html",
		"doc_type":"usermanual",
		"p_code":"32",
		"code":"34"
	},
	{
		"desc":"This section describes how to create a DDS replica set instance on the DDS management console. DDS allows you to tailor your computing resources and storage space to your",
		"product_code":"dds",
		"title":"Creating a Replica Set Instance",
		"uri":"dds_02_0012.html",
		"doc_type":"usermanual",
		"p_code":"32",
		"code":"35"
	},
	{
		"desc":"This section guides you on how to add a security group rule to control access from and to DDS DB instances in a security group. This document describes how to set securit",
		"product_code":"dds",
		"title":"Setting a Security Group",
		"uri":"dds_02_0013.html",
		"doc_type":"usermanual",
		"p_code":"32",
		"code":"36"
	},
	{
		"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":"dds",
		"title":"Connecting to a Replica Set Instance",
		"uri":"dds_02_0014.html",
		"doc_type":"usermanual",
		"p_code":"32",
		"code":"37"
	},
	{
		"desc":"You can access DDS through a private IP address or an EIP. The application scenario of the connection address is as follows:Use a private IP address when:DDS provides a p",
		"product_code":"dds",
		"title":"Binding and Unbinding an EIP",
		"uri":"dds_02_0015.html",
		"doc_type":"usermanual",
		"p_code":"37",
		"code":"38"
	},
	{
		"desc":"DDS allows you to use SSL to encrypt connections to a DB instance to protect your data.If SSL is enabled, you can connect to a database using SSL. For details, see SSL Co",
		"product_code":"dds",
		"title":"Enabling or Disabling SSL",
		"uri":"dds_02_0016.html",
		"doc_type":"usermanual",
		"p_code":"37",
		"code":"39"
	},
	{
		"desc":"This section guides you on how to connect to DB instances through a database client using a common connection or an SSL connection. You are advised to use SSL to encrypt ",
		"product_code":"dds",
		"title":"Connecting to a DB Instance Through a Client",
		"uri":"en-us_topic_0105284966.html",
		"doc_type":"usermanual",
		"p_code":"37",
		"code":"40"
	},
	{
		"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":"dds",
		"title":"Managing DDS DB Instances",
		"uri":"dds_03_0001.html",
		"doc_type":"usermanual",
		"p_code":"",
		"code":"41"
	},
	{
		"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":"dds",
		"title":"DB Instance Operations",
		"uri":"dds_03_0002.html",
		"doc_type":"usermanual",
		"p_code":"41",
		"code":"42"
	},
	{
		"desc":"This section guides you on how to modify the DB instance name to identify different DB instances.If you want to submit the change, click OK. The DB instance name can be 4",
		"product_code":"dds",
		"title":"Modifying the DB Instance Name",
		"uri":"dds_03_0075.html",
		"doc_type":"usermanual",
		"p_code":"42",
		"code":"43"
	},
	{
		"desc":"This section guides you on how to export DB instance information for analysis.",
		"product_code":"dds",
		"title":"Exporting DB Instance Information",
		"uri":"dds_03_0051.html",
		"doc_type":"usermanual",
		"p_code":"42",
		"code":"44"
	},
	{
		"desc":"A replica set consists of the primary node, secondary node, and hidden node. Primary and secondary nodes allow access from external services by providing IP addresses. Hi",
		"product_code":"dds",
		"title":"Manually Switching the Primary and Secondary Nodes of a Replica Set",
		"uri":"dds_03_0050.html",
		"doc_type":"usermanual",
		"p_code":"42",
		"code":"45"
	},
	{
		"desc":"You may need to restart a DB instance for maintenance purposes. After modifying some parameters, you must restart the DB instance for the modifications to take effect on ",
		"product_code":"dds",
		"title":"Restarting a DB Instance or a Node",
		"uri":"dds_03_0003.html",
		"doc_type":"usermanual",
		"p_code":"42",
		"code":"46"
	},
	{
		"desc":"This section guides you on how to delete a DB instance no longer used to release resources. You can delete the following types of DB instances:Cluster instanceReplica set",
		"product_code":"dds",
		"title":"Deleting a DB instance",
		"uri":"dds_03_0004.html",
		"doc_type":"usermanual",
		"p_code":"42",
		"code":"47"
	},
	{
		"desc":"This section guides you through how to create a database account and change the account password to manage the instances you created. When creating a database account for",
		"product_code":"dds",
		"title":"Managing Database Accounts",
		"uri":"dds_03_0057.html",
		"doc_type":"usermanual",
		"p_code":"41",
		"code":"48"
	},
	{
		"desc":"DDS supports access through EIPs by enabling public accessibility. You can also access a database through an ECS in the private network.Before migrating data from a Mongo",
		"product_code":"dds",
		"title":"Migrating Data",
		"uri":"dds_03_0052.html",
		"doc_type":"usermanual",
		"p_code":"41",
		"code":"49"
	},
	{
		"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":"dds",
		"title":"Backup and Restore",
		"uri":"dds_03_0006.html",
		"doc_type":"usermanual",
		"p_code":"41",
		"code":"50"
	},
	{
		"desc":"DDS backs up data automatically based on the automated backup policy you set. You are advised to regularly back up data in your database. If the database becomes faulty o",
		"product_code":"dds",
		"title":"Setting Automated Backup Policy",
		"uri":"en-us_topic_backup_restore.html",
		"doc_type":"usermanual",
		"p_code":"50",
		"code":"51"
	},
	{
		"desc":"This section guides you on how to create a manual backup. Creating a backup for a DB instance helps ensure data can be restored if needed, ensuring data reliability.When ",
		"product_code":"dds",
		"title":"Creating a Manual Backup",
		"uri":"dds_03_0007.html",
		"doc_type":"usermanual",
		"p_code":"50",
		"code":"52"
	},
	{
		"desc":"This section guides you on how to restore a DB instance from a backup.Currently, DDS only supports restoring backups to a new DB instance.You are recommended to deploy th",
		"product_code":"dds",
		"title":"Restoring a Cluster Instance from a Backup",
		"uri":"dds_03_0042.html",
		"doc_type":"usermanual",
		"p_code":"50",
		"code":"53"
	},
	{
		"desc":"This section guides you on how to restore a replica set instance from a backup.Currently, DDS only supports restoring backups to a new DB instance.You are recommended to ",
		"product_code":"dds",
		"title":"Restoring a Replica Set Instance from a Backup",
		"uri":"dds_03_0043.html",
		"doc_type":"usermanual",
		"p_code":"50",
		"code":"54"
	},
	{
		"desc":"This section describes how to download manual or automated backup files for local data backup or restoration.For details on how to log in to OBS Browser, see section Logg",
		"product_code":"dds",
		"title":"Downloading Backup Files",
		"uri":"en-us_topic_backup_download.html",
		"doc_type":"usermanual",
		"p_code":"50",
		"code":"55"
	},
	{
		"desc":"This section describes how to delete manual backups to release the storage space.The deletion operation is irreversible. Exercise caution when performing this operation.B",
		"product_code":"dds",
		"title":"Deleting a Manual Backup",
		"uri":"dds_03_0008.html",
		"doc_type":"usermanual",
		"p_code":"50",
		"code":"56"
	},
	{
		"desc":"This section guides you on how to delete an automated backup. If the automated backup policy is disabled, DDS allows you to delete stored automated backups to release sto",
		"product_code":"dds",
		"title":"Deleting an Automated Backup",
		"uri":"dds_03_0009.html",
		"doc_type":"usermanual",
		"p_code":"50",
		"code":"57"
	},
	{
		"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":"dds",
		"title":"Parameter Group",
		"uri":"dds_03_0010.html",
		"doc_type":"usermanual",
		"p_code":"41",
		"code":"58"
	},
	{
		"desc":"DB parameter groups act as a container for engine configuration values that are applied to one or more DB instances. This section guides you on how to create a parameter ",
		"product_code":"dds",
		"title":"Creating a Parameter Group",
		"uri":"en-us_topic_parameter_group.html",
		"doc_type":"usermanual",
		"p_code":"58",
		"code":"59"
	},
	{
		"desc":"This section guides you on how to edit parameters in the parameter groups that you have created to meet your service requirements and achieve optimal performance.Default ",
		"product_code":"dds",
		"title":"Editing a Parameter Group",
		"uri":"en-us_topic_configuration.html",
		"doc_type":"usermanual",
		"p_code":"58",
		"code":"60"
	},
	{
		"desc":"This section guides you on how to compare two parameter groups of the same node type and DB engine version to know their current settings.If the settings of the two param",
		"product_code":"dds",
		"title":"Comparing Two Parameter Groups",
		"uri":"dds_03_0012.html",
		"doc_type":"usermanual",
		"p_code":"58",
		"code":"61"
	},
	{
		"desc":"This section guides you on how to replicate a parameter group you created and assign it a name different from that of original group.Parameter Group Name: specifies the p",
		"product_code":"dds",
		"title":"Replicating a Parameter Group",
		"uri":"dds_03_0013.html",
		"doc_type":"usermanual",
		"p_code":"58",
		"code":"62"
	},
	{
		"desc":"After a DB instance is created, you can change the parameter group associated with the DB instance to achieve optimal performance. The parameter group associated with the",
		"product_code":"dds",
		"title":"Changing Associated Parameter Group",
		"uri":"dds_03_0014.html",
		"doc_type":"usermanual",
		"p_code":"58",
		"code":"63"
	},
	{
		"desc":"This section guides you on how to reset all parameters in a parameter group you create to the default settings as needed.Resetting the parameter group will restore the de",
		"product_code":"dds",
		"title":"Resetting a Parameter Group",
		"uri":"dds_03_0015.html",
		"doc_type":"usermanual",
		"p_code":"58",
		"code":"64"
	},
	{
		"desc":"The section describes how to modify the description of the parameter group you created so that you can distinguish and identify parameter groups.",
		"product_code":"dds",
		"title":"Changing a Parameter Group Description",
		"uri":"dds_03_0044.html",
		"doc_type":"usermanual",
		"p_code":"58",
		"code":"65"
	},
	{
		"desc":"This section guides you on how to delete a parameter group. The following parameter groups cannot be deleted.Default parameter groupsParameter groups associated with DB i",
		"product_code":"dds",
		"title":"Deleting a Parameter Group",
		"uri":"dds_03_0016.html",
		"doc_type":"usermanual",
		"p_code":"58",
		"code":"66"
	},
	{
		"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":"dds",
		"title":"Storage",
		"uri":"dds_03_0017.html",
		"doc_type":"usermanual",
		"p_code":"41",
		"code":"67"
	},
	{
		"desc":"This section guides you on how to add nodes to a DB instance.You can add nodes when the instance status is Available, Deleting backup, or Checking restoration.A DB instan",
		"product_code":"dds",
		"title":"Adding Cluster Instance Nodes",
		"uri":"en-us_topic_increase_nodes.html",
		"doc_type":"usermanual",
		"p_code":"67",
		"code":"68"
	},
	{
		"desc":"This section guides you on how to revert nodes that fail to be added.During reversal, the node status is Deleting node. This process takes about 1 to 3 minutes.During del",
		"product_code":"dds",
		"title":"Reverting Cluster Instance Nodes",
		"uri":"dds_03_0018.html",
		"doc_type":"usermanual",
		"p_code":"67",
		"code":"69"
	},
	{
		"desc":"This section guides you on how to scale up the storage space of a DB instance to suit your service requirements.You can scale up a DB instance a maximum of eight times.Yo",
		"product_code":"dds",
		"title":"Scaling Up Storage Space",
		"uri":"en-us_topic_increase_storage.html",
		"doc_type":"usermanual",
		"p_code":"67",
		"code":"70"
	},
	{
		"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":"dds",
		"title":"Changing DB Instance Classes",
		"uri":"dds_08_0001.html",
		"doc_type":"usermanual",
		"p_code":"41",
		"code":"71"
	},
	{
		"desc":"This section guides you on how to change the CPU or memory of a cluster instance.A DB instance cannot be deleted when you are changing its CPU or memory.Instances can be ",
		"product_code":"dds",
		"title":"Changing the CPU or Memory of a Cluster DB Instance",
		"uri":"en-us_topic_0104472218.html",
		"doc_type":"usermanual",
		"p_code":"71",
		"code":"72"
	},
	{
		"desc":"This section guides you on how to change the CPU or memory of your replica set instance.A DB instance cannot be deleted when you are changing its CPU or memory.Instances ",
		"product_code":"dds",
		"title":"Changing the CPU or Memory of a Replica Set DB Instance",
		"uri":"en-us_topic_0104721795.html",
		"doc_type":"usermanual",
		"p_code":"71",
		"code":"73"
	},
	{
		"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":"dds",
		"title":"Security",
		"uri":"dds_03_0019.html",
		"doc_type":"usermanual",
		"p_code":"41",
		"code":"74"
	},
	{
		"desc":"You are advised to change administrator passwords periodically to prevent password cracking, ensuring system security. You cannot reset the administrator password under t",
		"product_code":"dds",
		"title":"Resetting the Administrator Password",
		"uri":"en-us_topic_reset_password.html",
		"doc_type":"usermanual",
		"p_code":"74",
		"code":"75"
	},
	{
		"desc":"This section guides you on how to modify the database port to ensure system security. The database port cannot be changed when the instance is in any of the following sta",
		"product_code":"dds",
		"title":"Changing the Database Port",
		"uri":"en-us_topic_change_database_port.html",
		"doc_type":"usermanual",
		"p_code":"74",
		"code":"76"
	},
	{
		"desc":"This section guides you on how to change the security group of a DB instance. If any of the following operations is in progress, do not change the security group:Adding n",
		"product_code":"dds",
		"title":"Changing a Security Group",
		"uri":"en-us_topic_change_security_group.html",
		"doc_type":"usermanual",
		"p_code":"74",
		"code":"77"
	},
	{
		"desc":"Tag Management Service (TMS) enables you to use tags on the management console to manage resources. TMS works with other cloud services to manage tags. TMS manages tags g",
		"product_code":"dds",
		"title":"Tag",
		"uri":"dds_03_0023.html",
		"doc_type":"usermanual",
		"p_code":"41",
		"code":"78"
	},
	{
		"desc":"This section describes how to view the progress and result of asynchronous tasks on the Task Center page.Currently, only the following tasks can be viewed:Creating a clus",
		"product_code":"dds",
		"title":"Task Center",
		"uri":"dds_03_0040.html",
		"doc_type":"usermanual",
		"p_code":"41",
		"code":"79"
	},
	{
		"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":"dds",
		"title":"Monitoring",
		"uri":"dds_03_0024.html",
		"doc_type":"usermanual",
		"p_code":"",
		"code":"80"
	},
	{
		"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":"dds",
		"title":"Interconnected with Cloud Eye",
		"uri":"dds_03_0025.html",
		"doc_type":"usermanual",
		"p_code":"80",
		"code":"81"
	},
	{
		"desc":"Table 1 lists the DB instance monitoring metrics.DB instance monitoring metricsMetricsUnitCOMMAND Statements per SecondCount/sDELETE Statements per SecondCount/sINSERT St",
		"product_code":"dds",
		"title":"DDS Metrics",
		"uri":"dds_03_0026.html",
		"doc_type":"usermanual",
		"p_code":"81",
		"code":"82"
	},
	{
		"desc":"You can set DDS alarm rules to customize the monitored objects and notification policies. Then, you can learn DDS running status in a timely manner.The DDS alarm rules in",
		"product_code":"dds",
		"title":"Setting Alarm Rules",
		"uri":"dds_03_0027.html",
		"doc_type":"usermanual",
		"p_code":"81",
		"code":"83"
	},
	{
		"desc":"Cloud Eye monitors DDS running statuses. You can obtain the monitoring metrics of DDS on the management console.Monitored data requires a period of time for transmission ",
		"product_code":"dds",
		"title":"Viewing DDS Metrics",
		"uri":"dds_03_0078.html",
		"doc_type":"usermanual",
		"p_code":"81",
		"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":"dds",
		"title":"Interconnecting with CTS",
		"uri":"dds_03_0028.html",
		"doc_type":"usermanual",
		"p_code":"80",
		"code":"85"
	},
	{
		"desc":"With CTS, you can record operations associated with DDS for later query, audit, and backtrack operations.",
		"product_code":"dds",
		"title":"Key Operations Recorded by CTS",
		"uri":"dds_03_0029.html",
		"doc_type":"usermanual",
		"p_code":"85",
		"code":"86"
	},
	{
		"desc":"After CTS is enabled, the tracker starts recording operations on cloud resources. Operation records for the last 7 days are stored on the CTS console.This section describ",
		"product_code":"dds",
		"title":"Querying Traces",
		"uri":"dds_03_0032.html",
		"doc_type":"usermanual",
		"p_code":"85",
		"code":"87"
	},
	{
		"desc":"DDS log management allows you to view database-level logs, including warning- and error-level logs generated during database running, which help you analyze system proble",
		"product_code":"dds",
		"title":"Error Log",
		"uri":"en-us_topic_error_log.html",
		"doc_type":"usermanual",
		"p_code":"80",
		"code":"88"
	},
	{
		"desc":"Slow query logs record statements whose execution period exceeds the value of slowms (100 ms by default), allowing you identify and optimize slowly executed statements.Lo",
		"product_code":"dds",
		"title":"Slow Query Log",
		"uri":"en-us_topic_slow_query_log.html",
		"doc_type":"usermanual",
		"p_code":"80",
		"code":"89"
	},
	{
		"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":"dds",
		"title":"FAQs",
		"uri":"dds_faq_0100.html",
		"doc_type":"usermanual",
		"p_code":"",
		"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.",
		"product_code":"dds",
		"title":"Common FAQs",
		"uri":"dds_faq_0101.html",
		"doc_type":"usermanual",
		"p_code":"90",
		"code":"91"
	},
	{
		"desc":"FailoverDDS uses multiple mongos, replica sets, and shards to ensure data reliability. When a mongos is faulty, the other mongos takes over services immediately to ensure",
		"product_code":"dds",
		"title":"What Precautions Should Be Taken When Using DDS?",
		"uri":"dds_faq_0001.html",
		"doc_type":"usermanual",
		"p_code":"91",
		"code":"92"
	},
	{
		"desc":"Formula for a DDS DB instance availability:DDS DB instance availability = (1 – Failure duration/Total service duration) × 100%.",
		"product_code":"dds",
		"title":"What Is the Availability of DDS DB Instances?",
		"uri":"dds_faq_0002.html",
		"doc_type":"usermanual",
		"p_code":"91",
		"code":"93"
	},
	{
		"desc":"You do not need a template to create DDS DB instances. When you create a DB instance, DDS provides different DB instance specifications which are similar to templates.",
		"product_code":"dds",
		"title":"Can I Use a Template to Create DDS DB Instances?",
		"uri":"dds_faq_0003.html",
		"doc_type":"usermanual",
		"p_code":"91",
		"code":"94"
	},
	{
		"desc":"No. Your DDS DB instances and resources are isolated from others.",
		"product_code":"dds",
		"title":"Will My DDS DB Instances Be Affected by Other Users' DDS DB Instances?",
		"uri":"dds_faq_0004.html",
		"doc_type":"usermanual",
		"p_code":"91",
		"code":"95"
	},
	{
		"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":"dds",
		"title":"Management FAQs",
		"uri":"dds_faq_0102.html",
		"doc_type":"usermanual",
		"p_code":"90",
		"code":"96"
	},
	{
		"desc":"You can view the slow query logs to check whether any slowly executed SQL queries exist and view the performance characteristics of queries (if any) to locate the cause o",
		"product_code":"dds",
		"title":"What Should I Do If My Query Is Slow?",
		"uri":"dds_faq_0005.html",
		"doc_type":"usermanual",
		"p_code":"96",
		"code":"97"
	},
	{
		"desc":"The delay for primary/secondary synchronization cannot be calculated using a formula. The delay is affected by the following factors:Network communication statusTransacti",
		"product_code":"dds",
		"title":"What Is the Time Delay for Primary/Secondary Synchronization in a Replica Set?",
		"uri":"dds_faq_0006.html",
		"doc_type":"usermanual",
		"p_code":"96",
		"code":"98"
	},
	{
		"desc":"DDS does not delete or perform any operations on any user data. If this problem occurs, check whether a misoperation has been performed. Restore the data using backup fil",
		"product_code":"dds",
		"title":"Why Is Data Missing from My Database?",
		"uri":"dds_faq_0007.html",
		"doc_type":"usermanual",
		"p_code":"96",
		"code":"99"
	},
	{
		"desc":"If your cloud account is deleted, both your automated and manual backups are deleted.",
		"product_code":"dds",
		"title":"Will My Backups Be Deleted If I Delete My Cloud Account?",
		"uri":"dds_faq_0008.html",
		"doc_type":"usermanual",
		"p_code":"96",
		"code":"100"
	},
	{
		"desc":"Yes. Adding shards does not affect the existing shards. Services are still available.",
		"product_code":"dds",
		"title":"Are My DDS DB Instances Available When Scaling?",
		"uri":"dds_faq_0009.html",
		"doc_type":"usermanual",
		"p_code":"96",
		"code":"101"
	},
	{
		"desc":"Yes. DDS can perform write operations only on the primary node in a replica set. You can configure DDS to perform read operations on the secondary node to split read and ",
		"product_code":"dds",
		"title":"Does DDS Support Read/Write Splitting?",
		"uri":"dds_faq_0010.html",
		"doc_type":"usermanual",
		"p_code":"96",
		"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.",
		"product_code":"dds",
		"title":"Connection and Access FAQs",
		"uri":"dds_faq_0104.html",
		"doc_type":"usermanual",
		"p_code":"90",
		"code":"103"
	},
	{
		"desc":"You can access the DDS DB instance using the following methods:Create a DDS DB instance and an ECS in the same VPC to enable the ECS to access the instance.If the DDS DB ",
		"product_code":"dds",
		"title":"Can an External Server Access the DDS DB Instance?",
		"uri":"dds_faq_0011.html",
		"doc_type":"usermanual",
		"p_code":"103",
		"code":"104"
	},
	{
		"desc":"The number of DDS database connections indicates the number of applications that can be simultaneously connected to the database. Generally, it indicates the number of co",
		"product_code":"dds",
		"title":"What Is the Number of DDS Database Connections?",
		"uri":"dds_faq_0012.html",
		"doc_type":"usermanual",
		"p_code":"103",
		"code":"105"
	},
	{
		"desc":"Perform the following steps to identify the problem: The following uses the cluster instance as an example.If they are in the same VPC, go to 2.If they are in different V",
		"product_code":"dds",
		"title":"What Should I Do If the ECS Cannot Connect to a DDS DB Instance?",
		"uri":"dds_faq_0013.html",
		"doc_type":"usermanual",
		"p_code":"103",
		"code":"106"
	},
	{
		"desc":"Identify a DDS DB instance connection failure caused by a client problem from the following aspects.ECS Security PolicyIn Windows, check whether the DDS port is enabled i",
		"product_code":"dds",
		"title":"What Should I Do If a Database Client Problem Causes a Connection Failure?",
		"uri":"dds_faq_0014.html",
		"doc_type":"usermanual",
		"p_code":"103",
		"code":"107"
	},
	{
		"desc":"Check whether the following problems occur on the DDS database. Check the following one at a time.The maximum number of connections is reached.Solution: Use the Cloud Eye",
		"product_code":"dds",
		"title":"What Should I Do If a DDS Server Problem Causes a Connection Failure?",
		"uri":"dds_faq_0015.html",
		"doc_type":"usermanual",
		"p_code":"103",
		"code":"108"
	},
	{
		"desc":"Ensure that the ECS where in which your applications are located is in the same VPC and subnet as the DDS DB instance. If the ECS and the DDS DB instance are in different",
		"product_code":"dds",
		"title":"How Can My Applications Access a DDS DB Instance in a VPC?",
		"uri":"dds_faq_0016.html",
		"doc_type":"usermanual",
		"p_code":"103",
		"code":"109"
	},
	{
		"desc":"It is recommended that your applications support automatic reconnections to the database. After a database reboot, your applications will automatically reconnect to the d",
		"product_code":"dds",
		"title":"Do Applications Need to Support Automatic Reconnecting to the DDS Database?",
		"uri":"dds_faq_0017.html",
		"doc_type":"usermanual",
		"p_code":"103",
		"code":"110"
	},
	{
		"desc":"For details on how to create and log in to an ECS, see \"Creating and Logging In to a Windows ECS\" or \"Creating and Logging In to a Linux ECS\" in the Elastic Cloud Server ",
		"product_code":"dds",
		"title":"How Can I Create and Log In to an ECS?",
		"uri":"dds_faq_0034.html",
		"doc_type":"usermanual",
		"p_code":"103",
		"code":"111"
	},
	{
		"desc":"MongoDB official website provides client installation packages for different OSs. Download the official binary installation package at https://www.mongodb.com/download-ce",
		"product_code":"dds",
		"title":"How Can I Install a MongoDB Client?",
		"uri":"dds_faq_0018.html",
		"doc_type":"usermanual",
		"p_code":"103",
		"code":"112"
	},
	{
		"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":"dds",
		"title":"Parameter and Metric FAQs",
		"uri":"dds_faq_0108.html",
		"doc_type":"usermanual",
		"p_code":"90",
		"code":"113"
	},
	{
		"desc":"You need to focus on the CPU, memory, and storage space usage.You can configure DDS to report alarms as needed. If an alarm is reported, you can take proper measures to c",
		"product_code":"dds",
		"title":"What DB Instance Monitoring Metrics Do I Need to Pay Attention To?",
		"uri":"dds_faq_0019.html",
		"doc_type":"usermanual",
		"p_code":"113",
		"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.",
		"product_code":"dds",
		"title":"Network and Security FAQs",
		"uri":"dds_faq_0110.html",
		"doc_type":"usermanual",
		"p_code":"90",
		"code":"115"
	},
	{
		"desc":"DDS allows you to set the VPC which DDS DB instances belong to, ensuring that the DDS DB instances are isolated from other services. In addition, the IAM service is provi",
		"product_code":"dds",
		"title":"What Security Protection Policies Does DDS Have?",
		"uri":"dds_faq_0021.html",
		"doc_type":"usermanual",
		"p_code":"115",
		"code":"116"
	},
	{
		"desc":"A VPC allows you to create virtual network environment in a private and isolated network to control the private IP address range, subnets, route tables, and network gatew",
		"product_code":"dds",
		"title":"Do I Need to Use DDS in a VPC?",
		"uri":"dds_faq_0022.html",
		"doc_type":"usermanual",
		"p_code":"115",
		"code":"117"
	},
	{
		"desc":"The VPC security group helps ensure the security of DDS in a VPC. In addition, ACL can be used to allow or reject I/O network traffic for each subnet. Use the internal se",
		"product_code":"dds",
		"title":"How Do I Ensure the Security of DDS in a VPC?",
		"uri":"dds_faq_0023.html",
		"doc_type":"usermanual",
		"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.",
		"product_code":"dds",
		"title":"Storage FAQs",
		"uri":"dds_faq_0109.html",
		"doc_type":"usermanual",
		"p_code":"90",
		"code":"119"
	},
	{
		"desc":"You can store DDS backup data on the ECS using mongoexport. However, you are advised not to store database backups on ECSs. You are advised to use the DDS backup function",
		"product_code":"dds",
		"title":"How Do I Back Up DDS to ECS?",
		"uri":"dds_faq_0025.html",
		"doc_type":"usermanual",
		"p_code":"119",
		"code":"120"
	},
	{
		"desc":"The automated backup retention period is 7 days by default. You can set a backup retention period from 1 to 732 days. There is no limit on the manual backup retention per",
		"product_code":"dds",
		"title":"How Long Does DDS Store Backup Data For?",
		"uri":"dds_faq_0026.html",
		"doc_type":"usermanual",
		"p_code":"119",
		"code":"121"
	},
	{
		"desc":"The EVS is used for data storage of DDS DB instances. For details on the EVS, see Elastic Volume Service User Guide.The DDS DB instance backup data is stored in the OBS a",
		"product_code":"dds",
		"title":"What Is the DDS DB Instance Storage Configuration?",
		"uri":"dds_faq_0028.html",
		"doc_type":"usermanual",
		"p_code":"119",
		"code":"122"
	},
	{
		"desc":"If the storage space required by your applications exceeds the allowed maximum space allocated to you, you can do either of the following:Scale up storage space.Add shard",
		"product_code":"dds",
		"title":"What Should I Do If My Data Exceeds the Database Storage Space of a DDS DB Instance?",
		"uri":"dds_faq_0029.html",
		"doc_type":"usermanual",
		"p_code":"119",
		"code":"123"
	},
	{
		"desc":"Both your common data (excluding backup data) and data required for ensuring DB instance proper running occupy the storage space on your purchased DDS DB instances. To en",
		"product_code":"dds",
		"title":"Which Items Occupy the Storage Space on My Purchased DDS DB Instances?",
		"uri":"dds_faq_0030.html",
		"doc_type":"usermanual",
		"p_code":"119",
		"code":"124"
	},
	{
		"desc":"The storage space you applied for will contain the system overhead required for inode, reserved block, and database operation.",
		"product_code":"dds",
		"title":"What Overhead Does the Storage Space Have After I Applied for a DDS DB Instance?",
		"uri":"dds_faq_0031.html",
		"doc_type":"usermanual",
		"p_code":"119",
		"code":"125"
	},
	{
		"desc":"Logs and files listed in the following table occupy storage space.",
		"product_code":"dds",
		"title":"Which Types of Logs and Files Occupy DDS DB Instance Storage Space?",
		"uri":"dds_faq_0032.html",
		"doc_type":"usermanual",
		"p_code":"119",
		"code":"126"
	},
	{
		"desc":"The following tables list the commands supported and restricted by DDS.",
		"product_code":"dds",
		"title":"Which Commands are Supported or Restricted by DDS?",
		"uri":"dds_faq_0033.html",
		"doc_type":"usermanual",
		"p_code":"90",
		"code":"127"
	},
	{
		"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":"dds",
		"title":"Change History",
		"uri":"dds_change_history.html",
		"doc_type":"usermanual",
		"p_code":"",
		"code":"128"
	},
	{
		"desc":"For details about the glossaries in this document, see Glossary.",
		"product_code":"dds",
		"title":"Glossary",
		"uri":"dds_glossary.html",
		"doc_type":"usermanual",
		"p_code":"",
		"code":"129"
	}
]