doc-exports/docs/dcs/umn/dcs-ug-0326026.html

Change History

Released On	What's New
2024-05-10	Updated Creating a DCS Redis Instance and Modifying DCS Instance Specifications. Shard size can be customized for Redis Cluster instances.
2024-02-17	Updated Exporting DCS Instance List and How Do I Access a DCS Redis Instance Through Redis Desktop Manager?.
2023-09-25	Modified the following content: Added description about Redis Cluster instances in section Redis 6.0 Instance Specifications. Added note about connecting to Redis with SSL enabled in section Accessing a DCS Redis Instance Through redis-cli. Added Scanning Expired Keys and Managing Tags. Added description about parameter active-expire-num in section Modifying Configuration Parameters. Added How Does DCS Delete Expired Keys? and How Long Are Keys Stored? How Do I Set Key Expiration?
August 17, 2023	Modified the following content: Added section Data Migration Guide and added data migration FAQs in section Data Backup, Export, and Migration. Updated Accessing a DCS Redis Instance Through redis-cli and Access in Different Languages.
August 7, 2023	Modified the following content: Updated Master/Standby Redis, Accessing a DCS Redis Instance Through redis-cli, and Viewing Details of a DCS Instance. Added Connection Pool Selection and Recommended Jedis Parameter Settings, Should I Use a Domain Name or an IP Address to Connect to a DCS Redis Instance?, and Is the Read-only Address of a Master/Standby Instance Connected to the Master or Standby Node?.
April 17, 2023	Modified the following content: Updated descriptions in sections Web CLI Commands, Creating a DCS Redis Instance, Accessing a DCS Redis Instance Through redis-cli, Viewing Details of a DCS Instance, Viewing Redis Slow Queries, and Analyzing Big Keys and Hot Keys. Added Parameter Templates.
January 31, 2023	Modified the following content: Added description about Redis 6.0, such as Redis 6.0 Instance Specifications. Added Configuring SSL.
October 19, 2022	Added the following FAQs: Why Does a Key Disappear in Redis? Will Cached Data Be Retained After an Instance Is Restarted? How Do I View Current Concurrent Connections and Maximum Connections of a DCS Redis Instance? Why Is the Rejected Connections Metric Displayed? Why Is Flow Control Triggered? How Do I Handle It? Big/Hot Key Analysis and Expired Key Scan
August 29, 2022	Modified the following content: Added description about security groups and whitelist configuration in sections Creating a DCS Redis Instance, Security Group Configurations, What Should I Do If an Error Is Returned When I Use the Jedis Connection Pool?, How Do I Troubleshoot Redis Connection Failures?, and Why Aren't Security Groups Configured for DCS Redis 4.0/5.0/6.0 Instances?
August 9, 2022	Modified the following content: Added the 512 GB specifications of DCS Redis 3.0 instances in sections Proxy Cluster Redis and Redis 3.0 Instance Specifications. Added the impact of specification modification on some instances, in section Modifying DCS Instance Specifications. Optimized description about modifying configurations in sections Viewing Details of a DCS Instance, Restarting DCS Instances, Modifying Configuration Parameters, Viewing Redis Slow Queries, Manually Backing Up a DCS Instance, and Configuring Alarm Rules for Critical Metrics. Added section Managing IP Address Whitelist.
July 13, 2022	Modified the following content: Added description about system resources and modified the procedure for enabling auto backup in section Creating a DCS Redis Instance.
April 11, 2022	Modified the following content: Added description about accessing an instance in different languages. For details, see Accessing an Instance. Added section Managing Shards and Replicas.
June 30, 2021	Modified the following content: Optimized the procedure for creating an OBS bucket in section Importing Backup Files from an OBS Bucket. Updated the commands supported and disabled by Web CLI in section Web CLI Commands. Added the following FAQs: Why Aren't Security Groups Configured for DCS Redis 4.0/5.0/6.0 Instances? Can I Obtain the Addresses of the Nodes in a Cluster DCS Redis Instance? Does DCS for Redis Provide Backend Management Software? Why Is "Error in execution" Returned When I Access Redis? Monitoring and Alarm Online Migration with Rump
November 20, 2020	Modified the following content: Modified the description and specifications of DCS for Redis 3.0 in section What Is DCS? Modified the commands disabled in Proxy Cluster instances in section Redis 3.0 Instance Specifications.
July 13, 2021	Modified the following content: Added detailed description about permissions management in sections Permissions and Permissions Management.
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 Command Renaming. Added the cache analysis function. For details, see Analyzing Big Keys and Hot Keys. Added the slow log function. For details, see Viewing Redis Slow Queries. Added the run log function. For details, see Viewing Redis Run Logs. Added cluster instance metrics in section DCS Metrics.
September 30, 2020	Modified the following content: Added description about DCS Redis 4.0 and 5.0 instances in section What Is DCS? Added typical application scenarios in section Application Scenarios. Added section DCS Instance Types to describe the architectures of single-node, master/standby, Proxy Cluster, and Redis Cluster instances. Added section Disaster Recovery and Multi-Active Solution 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 DCS Instance Specifications. Added section Comparing DCS and Open-Source Cache Services. Added section Comparing Redis Versions 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 Command Compatibility. Added section Basic Concepts to describe the basic concepts of DCS. Added the description about OBS in section Related Services. Added section Identifying Requirements. Modified description about the process for creating instances and added description about creating DCS Redis 4.0 and 5.0 instances in section Creating a DCS Redis Instance. Added the description about the sold-out tip for the AZ parameter in section Creating a DCS Redis Instance. Modified descriptions in the Accessing a DCS Redis Instance Through redis-cli and Jedis sections. Added section Accessing a DCS Redis 4.0/5.0/6.0 Instance on the Console. Added description about DCS Redis 4.0 and 5.0 instances in section Viewing Details of a DCS Instance. Added notes on changing the DCS instance specifications in section Modifying DCS Instance Specifications. Added section Performing a Master/Standby Switchover for a DCS Instance. Added section Clearing DCS Instance Data to describe how to clear data of DCS Redis 4.0 and 5.0 instances. Added section Exporting DCS Instance List. Added section Viewing Data Storage Statistics of a DCS Redis 3.0 Proxy Cluster Instance. Added section Downloading a Backup File. Added section Migrating Data with DCS. Added section DCS Instance Passwords to describe the password used for connecting to DCS instances. Added metrics of DCS Redis 4.0 and 5.0 instances in section DCS Metrics. Added section Auditing to describe the DCS operations that can be recorded by CTS. Modified the structure of FAQs and added new FAQs in chapter FAQs.
2020-07-17	Modified the following content: Added a note in section Accessing a DCS Redis Instance Through redis-cli 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 DCS Metrics. Updated the picture that demonstrates viewing instance metrics in section Configuring Alarm Rules for Critical Metrics. Optimized the description about CIDR blocks for cross-VPC access and added the table caption in FAQ Does DCS Support Cross-VPC Access?
2020-05-30	Modified the following content: Changed the cluster instance type to Proxy Cluster in section What Is DCS? Removed description about creating multiple instances in batches and modified password complexity requirements in section Creating a DCS Redis Instance. Removed the instance topology parameter in section Viewing Details of a DCS Instance. 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 Modifying Configuration Parameters. Modified the special characters that the passwords cannot contain in section Changing Instance Passwords. 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 Configuring an Automatic Backup Policy. Removed Redis Server and Proxy metrics from section Monitoring.
2020-03-25	Modified the following content: Changed the cluster instance type to Proxy Cluster in section What Is DCS? Modified the lists of supported and disabled Redis commands in section Command Compatibility. Added the assured/maximum bandwidth parameter in section DCS Instance Specifications. Moved the metrics originally described in section Related Services to section DCS Metrics and updated the metrics supported by Cloud Eye. Modified instance creation parameters in Creating a DCS Redis Instance according to DCS console upgrade and parameter modifications. Modified instance details parameters in section Viewing Details of a DCS Instance according to DCS console upgrade and parameter modifications. Modified instance configuration parameters in section Modifying Configuration Parameters. Removed the function of stopping instances. Added description about restrictions of starting instances in section Starting DCS Instances. Changed parameter Time Window to Maintenance in section Modifying Maintenance Time Window. Modified description about configuring instance backup policies in section Configuring an Automatic Backup Policy. Added chapter Monitoring, 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 Does DCS for Redis Support Multiple Databases?
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 DCS Instance Specifications and Creating a DCS Redis Instance.
2018-09-05	Modified the following content: Opened certain Redis cluster commands. For details about compatibility with DCS commands, see Command Compatibility.
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 Accessing a DCS Redis Instance Through redis-cli. Added descriptions about the Redis-specific parameter notify-keyspace-events, and deleted descriptions about the Redis-specific parameter maxclients. For details, see Modifying Configuration Parameters. Added the procedures for modifying the time window and security group of a DCS instance. For details, see Modifying Maintenance Time Window and Modifying the Security Group. Added Does DCS Support Cross-VPC Access? in chapter FAQs. 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 Modifying DCS Instance Specifications and Backing Up and Restoring DCS Instances. Added the Time Window parameter. Added section Preparing Required Resources. Added some FAQs in chapter FAQs.
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.