:original_name: dcs-ug-0326026.html

.. _dcs-ug-0326026:

Change History
==============

 
| Released On                       | What's New                                                                                                                                                                                                                                                                                                                                                                                                                                                                                        |
 
| 2022-10-19                        | Added the following FAQs:                                                                                                                                                                                                                                                                                                                                                                                                                                                                         |
|                                   |                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                   |
|                                   | :ref:`Why Does a Key Disappear in Redis? <dcs-faq-210409001>`                                                                                                                                                                                                                                                                                                                                                                                                                                     |
|                                   |                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                   |
|                                   | :ref:`Will Cached Data Be Retained After an Instance Is Restarted? <dcs-faq-0220330>`                                                                                                                                                                                                                                                                                                                                                                                                             |
|                                   |                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                   |
|                                   | :ref:`How Do I View Current Concurrent Connections and Maximum Connections of a DCS Redis Instance? <dcs-faq-0427070>`                                                                                                                                                                                                                                                                                                                                                                            |
|                                   |                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                   |
|                                   | :ref:`Why Is the Rejected Connections Metric Displayed? <dcs-faq-0603001>`                                                                                                                                                                                                                                                                                                                                                                                                                        |
|                                   |                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                   |
|                                   | :ref:`Why Is Flow Control Triggered? How Do I Handle It? <dcs-faq-0220721>`                                                                                                                                                                                                                                                                                                                                                                                                                       |
|                                   |                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                   |
|                                   | :ref:`Analysis of Big Keys and Hot Keys <dcs-faq-0805001>`                                                                                                                                                                                                                                                                                                                                                                                                                                        |
 
| 2022-08-29                        | Modified the following content:                                                                                                                                                                                                                                                                                                                                                                                                                                                                   |
|                                   |                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                   |
|                                   | Added description about security groups and whitelist configuration in sections :ref:`Creating a DCS Redis Instance <dcs-ug-0326008>`, :ref:`Security Group Configurations <en-us_topic_0090662012>`, :ref:`What Should I Do If an Error Is Returned When I Use the Jedis Connection Pool? <dcs-faq-0730006>`, :ref:`How Do I Troubleshoot Redis Connection Failures? <dcs-faq-0730010>`, and :ref:`Why Aren't Security Groups Configured for DCS Redis 4.0 and 5.0 Instances? <dcs-faq-0730014>` |
 
| 2022-08-09                        | Modified the following content:                                                                                                                                                                                                                                                                                                                                                                                                                                                                   |
|                                   |                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                   |
|                                   | -  Added the 512 GB specifications of DCS Redis 3.0 instances in sections :ref:`Proxy Cluster Redis <cachecluster>` and :ref:`Redis 3.0 Instance Specifications <dcs-pd-0916001>`.                                                                                                                                                                                                                                                                                                                |
|                                   | -  Added the impact of specification modification on some instances, in section :ref:`Modifying DCS Instance Specifications <dcs-ug-0326011>`.                                                                                                                                                                                                                                                                                                                                                    |
|                                   | -  Optimized description about modifying configurations in sections :ref:`Viewing Details of a DCS Instance <dcs-ug-0312016>`, :ref:`Restarting DCS Instances <dcs-ug-0326013>`, :ref:`Modifying Configuration Parameters <dcs-ug-0312024>`, :ref:`Viewing Redis Slow Logs <dcs-ug-190926001>`, :ref:`Manually Backing Up a DCS Instance <dcs-ug-0312032>`, and :ref:`Configuring Alarm Rules for Critical Metrics <dcs-ug-190905001>`.                                                           |
|                                   | -  Added section :ref:`Managing IP Address Whitelist <dcs-ug-190812001>`.                                                                                                                                                                                                                                                                                                                                                                                                                         |
 
| 2022-07-13                        | Modified the following content:                                                                                                                                                                                                                                                                                                                                                                                                                                                                   |
|                                   |                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                   |
|                                   | Added description about system resources and modified the procedure for enabling auto backup in section :ref:`Creating a DCS Redis Instance <dcs-ug-0326008>`.                                                                                                                                                                                                                                                                                                                                    |
 
| 2022-04-11                        | Modified the following content:                                                                                                                                                                                                                                                                                                                                                                                                                                                                   |
|                                   |                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                   |
|                                   | Added description about accessing an instance in different languages. For details, see :ref:`Accessing an Instance <dcs-ug-0916002>`.                                                                                                                                                                                                                                                                                                                                                             |
|                                   |                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                   |
|                                   | Added section :ref:`Managing Shards and Replicas <dcs-ug-210107001>`.                                                                                                                                                                                                                                                                                                                                                                                                                             |
 
| 2021-06-30                        | Modified the following content:                                                                                                                                                                                                                                                                                                                                                                                                                                                                   |
|                                   |                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                   |
|                                   | -  Optimized the procedure for creating an OBS bucket in section :ref:`Importing Backup Files from an OBS Bucket <dcs-ug-0312037>`.                                                                                                                                                                                                                                                                                                                                                               |
|                                   | -  Updated the commands supported and disabled by Web CLI in section :ref:`Web CLI Commands <dcs-pd-190826001>`.                                                                                                                                                                                                                                                                                                                                                                                  |
|                                   | -  Added the following FAQs:                                                                                                                                                                                                                                                                                                                                                                                                                                                                      |
|                                   |                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                   |
|                                   |    -  :ref:`Why Aren't Security Groups Configured for DCS Redis 4.0 and 5.0 Instances? <dcs-faq-0730014>`                                                                                                                                                                                                                                                                                                                                                                                         |
|                                   |    -  :ref:`Can I Obtain the Addresses of the Nodes in a Cluster DCS Redis Instance? <dcs-faq-0730017>`                                                                                                                                                                                                                                                                                                                                                                                           |
|                                   |    -  :ref:`Does DCS for Redis Provide Backend Management Software? <dcs-faq-0730032>`                                                                                                                                                                                                                                                                                                                                                                                                            |
|                                   |    -  :ref:`Why Is "Error in execution" Returned When I Access Redis? <dcs-faq-210223001>`                                                                                                                                                                                                                                                                                                                                                                                                        |
|                                   |    -  :ref:`Monitoring and Alarm <dcs-faq-0326023>`                                                                                                                                                                                                                                                                                                                                                                                                                                               |
|                                   |    -  :ref:`Online Migration with Rump <dcs-migration-090626001>`                                                                                                                                                                                                                                                                                                                                                                                                                                 |
 
| 2020-11-20                        | Modified the following content:                                                                                                                                                                                                                                                                                                                                                                                                                                                                   |
|                                   |                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                   |
|                                   | -  Modified the description and specifications of DCS for Redis 3.0 in section :ref:`What Is DCS? <en-us_topic_0054235826>`                                                                                                                                                                                                                                                                                                                                                                       |
|                                   | -  Modified the commands disabled in Proxy Cluster instances in section :ref:`Redis 3.0 Instance Specifications <dcs-pd-0916001>`.                                                                                                                                                                                                                                                                                                                                                                |
 
| 2021-07-13                        | Modified the following content:                                                                                                                                                                                                                                                                                                                                                                                                                                                                   |
|                                   |                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                   |
|                                   | Added detailed description about permissions management in sections :ref:`Permissions Management <dcs-pd-210626001>` and :ref:`Permissions Management <dcs-ug-210626003>`.                                                                                                                                                                                                                                                                                                                        |
 
| 2020-10-13                        | Modified the following content:                                                                                                                                                                                                                                                                                                                                                                                                                                                                   |
|                                   |                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                   |
|                                   | -  Added support for renaming critical commands of DCS Redis 4.0 and 5.0 instances. For details, see :ref:`Command Renaming <dcs-ug-1009002>`.                                                                                                                                                                                                                                                                                                                                                    |
|                                   | -  Added the cache analysis function. For details, see :ref:`Cache Analysis <dcs-ug-190808001>`.                                                                                                                                                                                                                                                                                                                                                                                                  |
|                                   | -  Added the slow log function. For details, see :ref:`Viewing Redis Slow Logs <dcs-ug-190926001>`.                                                                                                                                                                                                                                                                                                                                                                                               |
|                                   | -  Added the run log function. For details, see :ref:`Viewing Redis Run Logs <dcs-ug-1009001>`.                                                                                                                                                                                                                                                                                                                                                                                                   |
|                                   | -  Added cluster instance metrics in section :ref:`DCS Metrics <dcs-ug-0326019>`.                                                                                                                                                                                                                                                                                                                                                                                                                 |
 
| 2020-09-30                        | Modified the following content:                                                                                                                                                                                                                                                                                                                                                                                                                                                                   |
|                                   |                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                   |
|                                   | -  Added description about DCS Redis 4.0 and 5.0 instances in section :ref:`What Is DCS? <en-us_topic_0054235826>`                                                                                                                                                                                                                                                                                                                                                                                |
|                                   | -  Added typical application scenarios in section :ref:`Application Scenarios <dcs-pd-0326002>`.                                                                                                                                                                                                                                                                                                                                                                                                  |
|                                   | -  Added section :ref:`DCS Instance Types <dcs-pd-200312001>` to describe the architectures of single-node, master/standby, Proxy Cluster, and Redis Cluster instances.                                                                                                                                                                                                                                                                                                                           |
|                                   | -  Added section :ref:`HA and DR Policies <globaldrpolicy>` to describe the disaster recovery strategies of DCS.                                                                                                                                                                                                                                                                                                                                                                                  |
|                                   | -  Added description about the specifications of DCS Redis 4.0 and 5.0 instances, QPS of DCS Redis 3.0 instances, and 1024 GB Proxy Cluster DCS Redis 3.0 instances in section :ref:`DCS Instance Specifications <en-us_topic_0054235835>`.                                                                                                                                                                                                                                                       |
|                                   | -  Added section :ref:`Comparing DCS and Open-Source Cache Services <dcs-pd-0326003>`.                                                                                                                                                                                                                                                                                                                                                                                                            |
|                                   | -  Added section :ref:`Comparing Redis Versions <redisdifference>` to compare DCS for Redis 3.0, 4.0, and 5.0.                                                                                                                                                                                                                                                                                                                                                                                    |
|                                   | -  Added description about command compatibility of DCS Redis 4.0 and 5.0 instances in section :ref:`Command Compatibility <dcs-pd-200312003>`.                                                                                                                                                                                                                                                                                                                                                   |
|                                   | -  Added section :ref:`Basic Concepts <dcs-pd-200312004>` to describe the basic concepts of DCS.                                                                                                                                                                                                                                                                                                                                                                                                  |
|                                   | -  Added the description about OBS in section :ref:`Related Services <dcs-pd-0326006>`.                                                                                                                                                                                                                                                                                                                                                                                                           |
|                                   | -  Added section :ref:`Identifying Requirements <purchasepreparation>`.                                                                                                                                                                                                                                                                                                                                                                                                                           |
|                                   | -  Modified description about the process for creating instances and added description about creating DCS Redis 4.0 and 5.0 instances in section :ref:`Creating a DCS Redis Instance <dcs-ug-0326008>`.                                                                                                                                                                                                                                                                                           |
|                                   | -  Added the description about the sold-out tip for the AZ parameter in section :ref:`Creating a DCS Redis Instance <dcs-ug-0326008>`.                                                                                                                                                                                                                                                                                                                                                            |
|                                   | -  Modified descriptions in sections :ref:`Accessing a DCS Redis Instance Through redis-cli <dcs-ug-0326009>` and :ref:`Jedis <dcs-ug-0713005>`.                                                                                                                                                                                                                                                                                                                                                  |
|                                   | -  Added section :ref:`Accessing a DCS Redis 4.0 or 5.0 Instance on the Console <dcs-ug-0312008>`.                                                                                                                                                                                                                                                                                                                                                                                                |
|                                   | -  Added description about DCS Redis 4.0 and 5.0 instances in section :ref:`Viewing Details of a DCS Instance <dcs-ug-0312016>`.                                                                                                                                                                                                                                                                                                                                                                  |
|                                   | -  Optimized the classification of operations in chapter :ref:`Operation Guide <dcs-ug-0326010>`.                                                                                                                                                                                                                                                                                                                                                                                                 |
|                                   | -  Added notes on changing the DCS instance specifications in section :ref:`Modifying DCS Instance Specifications <dcs-ug-0326011>`.                                                                                                                                                                                                                                                                                                                                                              |
|                                   | -  Added section :ref:`Performing a Master/Standby Switchover for a DCS Instance <dcs-ug-0312017>`.                                                                                                                                                                                                                                                                                                                                                                                               |
|                                   | -  Added section :ref:`Clearing DCS Instance Data <dcs-ug-0312018>` to describe how to clear data of DCS Redis 4.0 and 5.0 instances.                                                                                                                                                                                                                                                                                                                                                             |
|                                   | -  Added section :ref:`Exporting DCS Instance List <dcs-ug-0312019>`.                                                                                                                                                                                                                                                                                                                                                                                                                             |
|                                   | -  Added section :ref:`Viewing Data Storage Statistics of a DCS Redis 3.0 Proxy Cluster Instance <dcs-ug-0312029>`.                                                                                                                                                                                                                                                                                                                                                                               |
|                                   | -  Added section :ref:`Downloading a Backup File <dcs-ug-0312034>`.                                                                                                                                                                                                                                                                                                                                                                                                                               |
|                                   | -  Added section :ref:`Migrating Data with DCS <dcs-ug-0312035>`.                                                                                                                                                                                                                                                                                                                                                                                                                                 |
|                                   | -  Added section :ref:`DCS Instance Passwords <cache-instance-password>` to describe the password used for connecting to DCS instances.                                                                                                                                                                                                                                                                                                                                                           |
|                                   | -  Added metrics of DCS Redis 4.0 and 5.0 instances in section :ref:`DCS Metrics <dcs-ug-0326019>`.                                                                                                                                                                                                                                                                                                                                                                                               |
|                                   | -  Added section :ref:`Auditing <dcs-ug-0326017>` to describe the DCS operations that can be recorded by CTS.                                                                                                                                                                                                                                                                                                                                                                                     |
|                                   | -  Modified the structure of FAQs and added new FAQs in chapter :ref:`FAQs <dcs-faq-0326019>`.                                                                                                                                                                                                                                                                                                                                                                                                    |
 
| 2020-07-17                        | Modified the following content:                                                                                                                                                                                                                                                                                                                                                                                                                                                                   |
|                                   |                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                   |
|                                   | -  Added a note in section :ref:`Accessing a DCS Redis Instance Through redis-cli <dcs-ug-0326009>` to advise against hard-coding plaintext passwords in the code.                                                                                                                                                                                                                                                                                                                                |
|                                   | -  Added an explanation of the **SYS.DCS** namespace and optimized the table layout in section :ref:`DCS Metrics <dcs-ug-0326019>`.                                                                                                                                                                                                                                                                                                                                                               |
|                                   | -  Updated the picture that demonstrates viewing instance metrics in section :ref:`Configuring Alarm Rules for Critical Metrics <dcs-ug-190905001>`.                                                                                                                                                                                                                                                                                                                                              |
|                                   | -  Optimized the description about CIDR blocks for cross-VPC access and added the table caption in FAQ :ref:`Does DCS Support Cross-VPC Access? <en-us_topic_0100698850>`                                                                                                                                                                                                                                                                                                                         |
 
| 2020-05-30                        | Modified the following content:                                                                                                                                                                                                                                                                                                                                                                                                                                                                   |
|                                   |                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                   |
|                                   | -  Changed the cluster instance type to Proxy Cluster in section :ref:`What Is DCS? <en-us_topic_0054235826>`                                                                                                                                                                                                                                                                                                                                                                                     |
|                                   | -  Removed description about creating multiple instances in batches and modified password complexity requirements in section :ref:`Creating a DCS Redis Instance <dcs-ug-0326008>`.                                                                                                                                                                                                                                                                                                               |
|                                   | -  Removed the instance topology parameter in section :ref:`Viewing Details of a DCS Instance <dcs-ug-0312016>`.                                                                                                                                                                                                                                                                                                                                                                                  |
|                                   | -  Changed the default value of the **reserved-memory-percent** parameter to **0** and added a note clarifying that the configuration parameters supported by single-node and master/standby instances are different in section :ref:`Modifying Configuration Parameters <dcs-ug-0312024>`.                                                                                                                                                                                                       |
|                                   | -  Modified the special characters that the passwords cannot contain in section :ref:`Changing Instance Passwords <dcs-ug-0312040>`.                                                                                                                                                                                                                                                                                                                                                              |
|                                   | -  Removed the section which describes the function of viewing data storage statics of a Proxy Cluster instance.                                                                                                                                                                                                                                                                                                                                                                                  |
|                                   | -  Added a note clarifying that the backup policy function is not supported by single-node instances in section :ref:`Configuring a Backup Policy <dcs-ug-0312031>`.                                                                                                                                                                                                                                                                                                                              |
|                                   | -  Removed Redis Server and Proxy metrics from section :ref:`Monitoring <dcs-ug-0326016>`.                                                                                                                                                                                                                                                                                                                                                                                                        |
 
| 2020-03-25                        | Modified the following content:                                                                                                                                                                                                                                                                                                                                                                                                                                                                   |
|                                   |                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                   |
|                                   | -  Changed the cluster instance type to Proxy Cluster in section :ref:`What Is DCS? <en-us_topic_0054235826>`                                                                                                                                                                                                                                                                                                                                                                                     |
|                                   | -  Modified the lists of supported and disabled Redis commands in section :ref:`Command Compatibility <dcs-pd-200312003>`.                                                                                                                                                                                                                                                                                                                                                                        |
|                                   | -  Added the assured/maximum bandwidth parameter in section :ref:`DCS Instance Specifications <en-us_topic_0054235835>`.                                                                                                                                                                                                                                                                                                                                                                          |
|                                   | -  Moved the metrics originally described in section :ref:`Related Services <dcs-pd-0326006>` to section :ref:`DCS Metrics <dcs-ug-0326019>` and updated the metrics supported by Cloud Eye.                                                                                                                                                                                                                                                                                                      |
|                                   | -  Modified instance creation parameters in :ref:`Creating a DCS Redis Instance <dcs-ug-0326008>` according to DCS console upgrade and parameter modifications.                                                                                                                                                                                                                                                                                                                                   |
|                                   | -  Modified instance details parameters in section :ref:`Viewing Details of a DCS Instance <dcs-ug-0312016>` according to DCS console upgrade and parameter modifications.                                                                                                                                                                                                                                                                                                                        |
|                                   | -  Modified instance configuration parameters in section :ref:`Modifying Configuration Parameters <dcs-ug-0312024>`.                                                                                                                                                                                                                                                                                                                                                                              |
|                                   | -  Removed the function of stopping instances.                                                                                                                                                                                                                                                                                                                                                                                                                                                    |
|                                   | -  Added description about restrictions of starting instances in section :ref:`Starting DCS Instances <dcs-ug-0911001>`.                                                                                                                                                                                                                                                                                                                                                                          |
|                                   | -  Changed parameter **Time Window** to **Maintenance** in section :ref:`Modifying Maintenance Time Window <dcs-ug-0312025>`.                                                                                                                                                                                                                                                                                                                                                                     |
|                                   | -  Modified description about configuring instance backup policies in section :ref:`Configuring a Backup Policy <dcs-ug-0312031>`.                                                                                                                                                                                                                                                                                                                                                                |
|                                   | -  Added chapter :ref:`Monitoring <dcs-ug-0326016>`, updated metrics supported by Cloud Eye, and added description about operations of viewing monitoring data and setting alarm rules.                                                                                                                                                                                                                                                                                                           |
|                                   | -  Changed the supported number of DBs for single-node and master/standby instances in section :ref:`Does DCS for Redis Support Multiple Databases? <dcs-faq-0730019>`                                                                                                                                                                                                                                                                                                                            |
 
| 2019-04-12                        | Accepted in OTC-4.0/Agile-04.2019.                                                                                                                                                                                                                                                                                                                                                                                                                                                                |
 
| 2019-03-30                        | Modified the following content:                                                                                                                                                                                                                                                                                                                                                                                                                                                                   |
|                                   |                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                   |
|                                   | -  Removed support for creating DCS instances with the specification of 1 GB in sections :ref:`DCS Instance Specifications <en-us_topic_0054235835>` and :ref:`Creating a DCS Redis Instance <dcs-ug-0326008>`.                                                                                                                                                                                                                                                                                   |
 
| 2018-09-05                        | Modified the following content:                                                                                                                                                                                                                                                                                                                                                                                                                                                                   |
|                                   |                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                   |
|                                   | -  Opened certain Redis cluster commands. For details about compatibility with DCS commands, see :ref:`Command Compatibility <dcs-pd-200312003>`.                                                                                                                                                                                                                                                                                                                                                 |
 
| 2018-03-16                        | Added the following content:                                                                                                                                                                                                                                                                                                                                                                                                                                                                      |
|                                   |                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                   |
|                                   | -  Added the procedure for using a Redis Java (Jedis) client to access a DCS instance. For details, see :ref:`Accessing a DCS Redis Instance Through redis-cli <dcs-ug-0326009>`.                                                                                                                                                                                                                                                                                                                 |
|                                   | -  Added descriptions about the Redis-specific parameter **notify-keyspace-events**, and deleted descriptions about the Redis-specific parameter **maxclients**. For details, see :ref:`Modifying Configuration Parameters <dcs-ug-0312024>`.                                                                                                                                                                                                                                                     |
|                                   | -  Added the procedures for modifying the time window and security group of a DCS instance. For details, see :ref:`Modifying Maintenance Time Window <dcs-ug-0312025>` and :ref:`Modifying the Security Group <dcs-ug-0312026>`.                                                                                                                                                                                                                                                                  |
|                                   | -  Added :ref:`Does DCS Support Cross-VPC Access? <en-us_topic_0100698850>` in chapter :ref:`FAQs <dcs-faq-0326019>`.                                                                                                                                                                                                                                                                                                                                                                             |
|                                   |                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                   |
|                                   | Modified the following content:                                                                                                                                                                                                                                                                                                                                                                                                                                                                   |
|                                   |                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                   |
|                                   | -  Changed instance password complexity rules.                                                                                                                                                                                                                                                                                                                                                                                                                                                    |
 
| 2017-11-08                        | Added the following content:                                                                                                                                                                                                                                                                                                                                                                                                                                                                      |
|                                   |                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                   |
|                                   | -  Provided support for DCS instances in cluster mode.                                                                                                                                                                                                                                                                                                                                                                                                                                            |
|                                   | -  Added sections :ref:`Modifying DCS Instance Specifications <dcs-ug-0326011>` and :ref:`Backing Up and Restoring DCS Instances <dcs-ug-0312030>`.                                                                                                                                                                                                                                                                                                                                               |
|                                   | -  Added the **Time Window** parameter.                                                                                                                                                                                                                                                                                                                                                                                                                                                           |
|                                   | -  Added section :ref:`Preparing the Environment <dcs-ug-0312004>`.                                                                                                                                                                                                                                                                                                                                                                                                                               |
|                                   |                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                   |
|                                   | -  Added some FAQs in chapter :ref:`FAQs <dcs-faq-0326019>`.                                                                                                                                                                                                                                                                                                                                                                                                                                      |
 
| 2017-05-30                        | Added the following content:                                                                                                                                                                                                                                                                                                                                                                                                                                                                      |
|                                   |                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                   |
|                                   | -  Added descriptions about batch deletion of DCS instances.                                                                                                                                                                                                                                                                                                                                                                                                                                      |
|                                   | -  Added descriptions about the Redis-specific parameter **latency-monitor-threshold**.                                                                                                                                                                                                                                                                                                                                                                                                           |
 
| 2017-04-28                        | Added the following content:                                                                                                                                                                                                                                                                                                                                                                                                                                                                      |
|                                   |                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                   |
|                                   | -  Added descriptions of DCS metrics monitored by Cloud Eye.                                                                                                                                                                                                                                                                                                                                                                                                                                      |
 
| 2017-04-05                        | This issue is the first official release.                                                                                                                                                                                                                                                                                                                                                                                                                                                         |
 
