Help Center/ Distributed Cache Service/ User Guide (Ankara Region)/ Getting Started/ Creating an Instance/ Creating a DCS Redis Instance
Updated on 2024-11-26 GMT+08:00
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Creating a DCS Redis Instance

You can create one or more DCS Redis instances with the required computing capabilities and storage space based on service requirements.

  • DCS Redis 3.0 instances have been taken offline at new sites, but can still be used at existing sites. You are advised to use DCS Redis 4.0 and later instances.
  • You cannot upgrade the Redis version of an instance. For example, a single-node DCS instance cannot be upgraded from Redis 4.0 to Redis 5.0. If you need Redis features of later versions, create a DCS Redis instance of a later version and then migrate data from the earlier instance to the new one.
  • Single-node instances cannot ensure data persistence and do not support manual or scheduled data backup. Exercise caution before using them.

Prerequisites

You have prepared necessary resources.

Creating a DCS Redis Instance

  1. Log in to the DCS console.
  2. Click in the upper left corner of the console and select a region and a project.
  3. Click Create DCS Instance.
  4. Select a region closest to your application to reduce latency and accelerate access.
  5. Specify the following instance parameters based on the information collected in Identifying Requirements.

    1. Cache Engine:

      Select Redis.

    2. Version:

      Currently, versions 4.0/5.0/6.0 are supported.

    3. Set Instance Type to Single-node, Master/Standby, Proxy Cluster or Redis Cluster.
    4. Select a CPU architecture.
    5. Set Replicas. The default value is 2 (including the master).

      This parameter is displayed only when you select Redis 4.0 or later and the instance type is master/standby or Redis Cluster.

    6. Select an AZ.
      • To accelerate access, deploy your instance and your application in the same AZ.
      • There are multiple AZs in each region. If resources are insufficient in an AZ, the AZ will be unavailable. In this case, select another AZ.
    7. Instance Specification:

      The remaining quota is displayed on the console.

      To apply to increase quota, click Increase quota below the specifications.

  6. Configure the instance network parameters.

    1. Select a VPC and a subnet.
    2. Configure the IP address.

      Redis Cluster instances only support automatically-assigned IP addresses. The other instance types support both automatically-assigned IP addresses and manually-specified IP addresses. You can manually specify an IP address available in your subnet.

      For a DCS Redis 4.0 or later instance, you can specify a port number in the range from 1 to 65535. If no port is specified, the default port 6379 will be used. For a DCS Redis 3.0 instance, the port cannot be customized. Port 6379 will be used.

    3. Select a security group.

      A security group is a set of rules that control access to ECSs. It provides access policies for mutually trusted ECSs with the same security protection requirements in the same VPC.

      This parameter is displayed only for DCS Redis 3.0 instances. DCS Redis 4.0/5.0/6.0 instances are based on VPC endpoints and do not support security groups.

  7. Set Name.

    The value of Name contains at least 4 characters. When you create multiple instances at a time, the instances are named in the format of custom name-n, where n starts from 000 and is incremented by 1. For example, if you create two instances and set name to dcs_demo, the two instances are respectively named as dcs_demo-000 and dcs_demo-001.

  8. Set the instance password.

    • Select Yes or No for Password Protected.
      • Password-free access carries security risks. Exercise caution when selecting this mode.
      • After creating a DCS Redis instance to be accessed in password-free mode, you can set a password for it by using the password reset function. For details, see Changing Password Settings for DCS Redis Instances.
    • Password and Confirm Password: These parameters indicate the password of accessing the DCS Redis instance, and are displayed only when Password Protected is set to Yes.

      For security purposes, if password-free access is disabled, the system prompts you to enter an instance-specific password when you are accessing the DCS Redis instance. Keep your instance password secure and change it periodically.

  9. Choose whether to enable Auto Backup.

    This parameter is displayed only when the instance type is master/standby or cluster. For more information on how to configure a backup policy, see Overview.

  10. Specify the number of instances to create.
  11. Click More Settings to configure more parameters.

    1. Enter a description of the instance.
    2. Rename critical commands.

      Command Renaming is displayed for Redis 4.0 and later. Currently, you can only rename the COMMAND, KEYS, FLUSHDB, FLUSHALL, HGETALL, SCAN, HSCAN, SSCAN, and ZSCAN commands. For Proxy Cluster instances, you can also rename the DBSIZE and DBSTATS commands.

    3. Specify the maintenance window.

      Choose a window for DCS O&M personnel to perform maintenance on your instance. You will be contacted before any maintenance activities are performed.

  12. Click Create Now.

    The displayed page shows the instance information you have specified.

  13. Confirm the instance information and click Submit.
  14. Return to the Cache Manager page to view and manage your DCS instances.

    1. DCS Redis 4.0 and later instances are containerized and can be created within seconds.
    2. After a DCS instance has been successfully created, it enters the Running state by default.

Parent topic: Creating an Instance