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Creating a Custom Parameter Template for a DCS Instance System default parameter templates vary by Redis version and instance type. A system default parameter template contains default instance parameter configurations. Parameter templates can be customized for parameter configurations
Viewing Audit Logs of a DCS Redis Instance Command audit logs on the DCS console record client operations on DCS. The storage, query, and analysis of audit logs are provided by Log Tank Service (LTS). Currently, only Proxy Cluster DCS Redis 4.0 and later instances in the CN Beijing4
Viewing Client Information of a DCS Instance Session Session management helps addressing DCS instance performance issues or abnormal operations. Client connection information, command execution, and connection duration of a target instance session can be viewed in real time. Abnormal
Changing Cluster DCS Instances to be Across AZs To implement disaster recovery, cluster instances (whose master and standby nodes are) in a single AZ can be deployed across AZs by migrating the standby nodes to other AZs. Notes and Constraints Available only for single-AZ cluster
Upgrading Minor or Proxy Versions of a DCS Instance DCS optimizes functions and fixes vulnerabilities in minor and proxy upgrades. This section describes how to upgrade the minor or proxy version of an instance. Upgrading the minor or proxy version does not affect the instance connection
Commands Supported and Disabled by DCS for Redis 4.0 Huawei Cloud DCS for Redis 4.0 is developed based on Redis 4.x and is compatible with open-source protocols and commands. This section describes DCS for Redis 4.0's compatibility with Redis commands, including supported and disabled
Commands Supported and Disabled by DCS for Redis 5.0 Huawei Cloud DCS for Redis 5.0 is developed based on Redis 5.x and is compatible with open-source protocols and commands. This section describes DCS for Redis 5.0's compatibility with Redis commands, including supported and disabled
Commands Supported and Disabled by DCS for Redis 6.0 Huawei Cloud DCS for Redis 6.0 is fully compatible with open-source Redis 6. This section describes DCS for Redis 6.0's compatibility with KeyDB commands, including supported and disabled commands. DCS Redis instances support most
Infographics for Comparing DCS for Redis with Open-Source Redis
Commands Supported and Disabled by DCS for Redis 7.0 Huawei Cloud DCS for Redis 7.0 is fully compatible with open-source Redis 7. This section describes DCS for Redis 7.0's compatibility with KeyDB commands, including supported and disabled commands. DCS Redis instances support most
Does DCS for Redis Support Redis Clusters? Yes. DCS Redis 4.0 and later basic edition instances support native clusters (Redis Cluster) Parent topic: Feature
Does DCS for Redis Support Cross-AZ Deployment? Master/Standby, read/write splitting, and cluster DCS Redis instances can be deployed across availability zones (AZs). If instance nodes in an AZ are faulty, nodes in other AZs will not be affected. The standby node automatically becomes
Does DCS for Redis Support Command Audits? Auditing commands affects read and write performance. Currently, only Proxy Cluster DCS Redis 4.0 and later instances support command audit logs in certain regions. For details, see Viewing Audit Logs of a DCS Redis Instance. Parent topic
What Memcached Version Is Compatible with DCS for Memcached? DCS for Memcached is based on Redis 3.0 and is compatible with Memcached 1.5.1. Parent topic: Memcached Usage
Does DCS for Memcached Support Public Access? No. If public access is disabled for a DCS instance, you cannot access it in local environments and can only access it through an ECS that is in the same VPC as the instance. VPCs are used to ensure network security of public cloud services
How Does DCS Delete Expired Keys? Question What are the rules for scheduled deletion of expired keys on a daily basis? Can I customize the rules? Mechanisms for Deleting Expired Keys Lazy free deletion: The deletion strategy is controlled in the main I/O event loop. Before a read/
What DCS Instance Type Changes Are Supported? Table 1 Instance type change options supported by different DCS instances Version Supported Type Change Precautions Redis 3.0 From single-node to master/standby The instance cannot be connected for several seconds and remains read-only
Troubleshooting High Memory Usage of a DCS Redis Instance Symptom Redis provides fast database services. If the memory is insufficient, keys may be frequently evicted, the response time may increase, and the QPS may be unstable, affecting service running. This is normal due to Redis
Troubleshooting High Bandwidth Usage of a DCS Redis Instance Overview Redis instances are close to application services, and therefore they process a large amount of data access requests and use network bandwidth. The maximum bandwidth varies depending on the instance specifications
Troubleshooting High CPU Usage of a DCS Redis Instance Symptom The CPU usage of a Redis instance increases dramatically within a short period of time. If the CPU usage is too high, connections may time out, and master/standby switchover may be triggered. Possible Causes The service
