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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
Implementing Automatic DCS Redis Expansion During Peak Hours Scenarios and Pain Points Redis is used as cache at ultra-low latency in strong real-time scenarios such as e-commerce, gaming, and social networking. The memory usage and network throughput of a DCS instance surge during
Example 3: Deleting DCS Redis Instances in Batches Scenario This section describes how to delete DCS Redis instances in batches by calling APIs. For details about how to call APIs, see Calling APIs. Involved APIs Call APIs to perform the following steps required to delete DCS Redis
Test Data of Proxy Cluster DCS Redis 3.0 Instances Test Environment Redis instance specifications Redis 3.0 | 64 GB | Proxy Cluster ECS flavors General computing-plus | c6.xlarge.2 | 4 vCPUs | 8 GB Test Command redis-benchmark -h {IP} -p {Port} -a {password} -n {nreqs} -r {randomkeys
Querying Big Keys and Hot Keys in a DCS Redis Instance Big keys and hot keys are common issues. This section describes the big key and hot key analysis function on the DCS console. This function monitors the key that occupies most space of a Redis instance, or that is most frequently
Test Data of Redis Cluster DCS Redis 6.0 Instances DCS Redis 6.0 basic edition instances support SSL. This section covers the performance tested with and without SSL enabled. Test Environment Redis instance specifications Redis 6.0 | Basic edition | 32 GB | Redis Cluster ECS flavors
Can I Access DCS Instances in a Local Environment? If public access is disabled for a DCS instance, you cannot access it in local environments and can only access it through an ECS in a VPC that can communicate with the instance. VPCs are used to ensure network security of services
Can I Recover Deleted Data of a DCS Instance? If you have backed up the DCS instance, you can restore its data from the backup. However, the restoration will overwrite the data written in before the restoration. You can restore backup data to a master/standby, cluster, or read/write
Does DCS for Redis Support the INCR and EXPIRE Commands? Yes. For more information about Redis command compatibility, see Redis Command Compatibility. Parent topic: Redis Commands
Are DCS Instances Stopped or Restarted During Specification Modification? No. Specification modifications can take place while the instance is running, and do not require disabling instance resources or restarting instances. Parent topic: Instance Scaling and Upgrade
How Do I Reduce the Capacity of a DCS Instance? Table 1 lists scaling options supported by different DCS instances. Table 1 Scaling options supported by different instances Cache Engine Single-Node Master/Standby Redis Cluster Proxy Cluster Read/Write Splitting Redis 3.0 Scaling up
What Data Structures Does DCS for Memcached Support? Only the key-value structure is supported. Parent topic: Memcached Usage
What Are the Differences Between DCS for Memcached and Self-Hosted Memcached? Table 1 describes the differences between DCS for Memcached and self-hosted Memcached. Table 1 Comparing DCS for Memcached and self-hosted Memcached Item DCS for Memcached Self-Hosted Memcached Deployment
What Are the Differences Between Arm-based and x86-based DCS for Redis? DCS Redis instances support Arm and x86 CPU architectures. Arm-based Redis and x86-based Redis have the same functions and client compatibility. x86-based Redis provides higher single-CPU performance than Arm-based
