检测到您已登录华为云国际站账号，为了您更好的体验，建议您访问国际站服务网站 https://www.huaweicloud.com/intl/zh-cn
不再显示此消息
检测到您已登录华为云国际站账号，为了您更好的体验，建议您访问国际站服务网站 https://www.huaweicloud.com/intl/zh-cn
不再显示此消息
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 Available Memory of Unused DCS Instances Less Than Total Memory and Why Is Memory Usage of Unused DCS Instances Greater Than Zero? For DCS Redis 3.0 instances and Memcached instances, the available memory is less than the total memory because some memory is reserved for system
Test Data of Master/Standby DCS Redis 4.0 or 5.0 Instances Test Environment Redis instance specifications Redis 4.0 or 5.0 | 8 GB | master/standby Redis 4.0 or 5.0 | 32 GB | master/standby ECS flavors General computing-enhanced | c6.2xlarge.2 | 8 vCPUs | 16 GB ECS image Ubuntu 18.04
Returning the Real IP Addresses of a Client to DCS (IP Pass-through) When a client of a DCS Redis 4.0 or later instance connects to the server through a VPC endpoint, the source IP address displayed on the server belongs to the VPC endpoint (starting with 198.19), and it is not the
Will I Be Charged for the EIP Used for Public Access to a DCS Redis Instance? Yes. You must pay for the EIP used for public access to a DCS Redis 3.0 instance. Before enabling public access, you must have an available EIP. For the billing details, see the EIP pricing details. Parent
Why Does It Take a Long Time to Start a Cluster DCS Instance? Possible cause: When a cluster instance is started, status and data are synchronized between the nodes of the instance. If a large amount of data is continuously written into the instance before the synchronization is complete
Is All Data in a DCS Redis Instance Migrated During Online Migration? Migration among multi-DB single-node, read/write splitting, or master/standby instances involves the full set of data. After the migration, a given key will remain in the same DB as it was before the migration.
What Policies Does DCS for Memcached Use to Deal with Expired Data? DCS for Memcached allows you to set the expiration time for stored data based on service requirements. For example, you can set the expire time when performing the add operation. By default, data is not evicted from
Does DCS Support External Extensions, Plug-ins, or Modules? No. DCS for Redis does not support external extensions, plug-ins, or modules. There is no plan for supporting modules. Parent topic: Redis Usage
Why Can't an IAM User See a New DCS Redis Instance? Symptom An IAM user cannot see a newly created DCS Redis instance. Possible Cause The IAM user does not have permissions for the enterprise project to which the new instance belongs. Solution Log in to the DCS console. In the upper
Can I Migrate Data Between DCS Memcached and Redis Instances? No. Memcached and Redis are different cache databases and do not support data migration between each other. Parent topic: Data Backup, Export, and Migration
Can I Obtain the Addresses of the Nodes in a Cluster DCS Redis Instance? Cluster DCS Redis 3.0 instances (Proxy Cluster type) are used in the same way that you use single-node or master/standby instances. You do not need to know the backend node addresses. For a cluster DCS Redis
What Should I Do If Access to DCS Fails After Server Disconnects? Analysis: If persistent connections ("pconnect" in Redis terminology) or connection pooling is used and connections are closed after being used for connecting to DCS instances, errors will be returned at attempts to
Why Is Public Access of My DCS Redis 3.0 Instance Unintentionally Disabled? Symptom: Public access has been enabled for a DCS Redis 3.0 instance but is suddenly disabled. Possible cause: The EIP bound to the DCS Redis instance is unbound. As a result, public access is automatically
What Should I Do If the Monitoring Data of a DCS Redis Instance Is Abnormal? If you have any doubt on the monitoring data of a DCS Redis instance, you can access the instance through redis-cli and run the INFO ALL command to view the metrics. For details about the output of the INFO
How Should I Select AZs When Creating a DCS Memcached Instance? Different AZs within a region do not differ in functions. Generally, instance deployment within an AZ features lower network latency while cross-AZ deployment ensures disaster recovery. If your application requires lower
How Do I Analyze the Hot Keys of a DCS Redis 3.0 Instance? DCS for Redis 3.0 does not support hot key analysis on the console. Alternatively, you can use the following methods to analyze hot keys: Method 1: Analyze the service structure and service implementation to discover possible
Should I Use a Domain Name or an IP Address to Connect to a DCS Redis Instance? Single-node, read/write splitting, and Proxy Cluster: Each instance has only one IP address and one domain name address. The addresses remain unchanged before and after master/standby switchover. You can
How Do I Access a DCS Redis Instance Through Redis Desktop Manager? You can access a DCS Redis 3.0 instance through the Redis Desktop Manager within a VPC or over the Internet. Within a VPC Enter the address, port number (6379), and authentication password of the DCS instance you
Why Is Redisson Distributed Lock Not Supported by DCS Proxy Cluster Redis 3.0 Instances? Redisson implements lock acquisition and unlocking in the following process: Redisson lock acquisition and unlocking are implemented by running Lua scripts. During lock acquisition, the EXISTS
