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Commands Supported and Disabled by DCS for Memcached (Discontinued) DCS for Memcached is no longer provided. You can use DCS Redis instances instead. Memcached supports the TCP-based text protocol and binary protocol. Any clients compatible with a Memcached protocol can access DCS
Does DCS for Redis Provide Backend Management Software? No. To query Redis configurations and usage information, use redis-cli. If you want to monitor DCS Redis instance metrics, go to the Cloud Eye console or perform the following operations. Procedure Log in to the DCS console.
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
Do DCS Redis Instances Limite Data Quantity? No, but the data volume cannot exceed the memory of a DCS instance. Parent topic: Feature
Does DCS for Redis Support SSL Encrypted Transmission? By default, SSL is disabled for DCS Redis 6.0 and 7.0 basic edition instances. To enable it, see . For public access to DCS Redis 3.0 instances, you can enable TLS encryption with Stunnel. For details, see the instructions on
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
Public Access to a DCS Redis 3.0 Instance (Discontinued) Enabling Public Access of a DCS Redis 3.0 Instance Connecting to Redis 3.0 over a Public Network on redis-cli Parent topic: Accessing a DCS Redis Instance
Commands Supported and Disabled by DCS for Redis 3.0 (Discontinued) DCS for Redis 3.0 is developed based on Redis 3.0.7 and is compatible with open-source protocols and commands. This section describes DCS for Redis 3.0's compatibility with Redis commands, including supported commands
Why Is CPU Usage of a DCS Redis Instance 100%? 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 QPS is
Can I Change the VPC and Subnet for a DCS Redis Instance? No. Once an instance is created, its VPC and subnet cannot be changed. To use a different set of VPC and subnet, create another instance with a desired set of VPC and subnet and then migrate data as required. For details about
Do DCS Redis Instances Limit the Size of a Key or Value? The maximum allowed size of a key is 512 MB. To reduce memory usage and facilitate key query, ensure that each key does not exceed 1 KB. The maximum allowed size of a string is 512 MB. The maximum allowed size of a Set, List
Can I Modify the Connection Addresses for Accessing a DCS Instance? After a DCS instance is created, its IP address and domain name for intra-VPC access cannot be modified. If public access has been enabled for the instance, the elastic IP address (EIP) bound to the instance can be
Why Do I Fail to Modify the Specifications for a DCS Instance? Check whether other tasks are running. Specifications of a DCS instance cannot be modified if another task of the instance is still running. For example, you cannot delete or scale up an instance while it is being restarted
Why Do I Fail to Create a DCS Redis Instance? The subnet does not have sufficient IP addresses. Analysis: Each node in a DCS instance must be assigned an IP address. Therefore, a single-node instance requires one IP address, a master/standby instance requires two IP addresses, and
