Help Center/ Distributed Cache Service/ User Guide/ Changing an Instance/ Upgrading Major Version of a DCS Redis 3.0 Instance
Updated on 2025-09-02 GMT+08:00
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Upgrading Major Version of a DCS Redis 3.0 Instance

DCS has discontinued Redis 3.0. Redis 3.0 has aged, and is out of updates in the open community. You are advised to upgrade your DCS Redis 3.0 instances as soon as possible. DCS for Redis of higher versions are compatible with Redis 3.0. This section describes how to upgrade Redis 3.0 to a later version in one click. (You are advised to use Redis 5.0 or later.)

Notes and Constraints

  • Currently, only DCS Redis 3.0 instances can be upgraded to higher versions. Major versions of DCS Redis 4.0 and later instances cannot be upgraded.
  • To upgrade a DCS Redis 3.0 instance with public access enabled, disable it first. To enable public access again, the bound EIPs can be used.
  • DCS Redis 4.0 or later instances cannot be directly bound to EIPs. To enable public access to them, use ELB. For details, see Enabling Public Access to Redis and Obtaining the Access Addresses.
  • Upgrade instances during off-peak hours.
  • Self-help rollback is unavailable.

Impacts

  • The upgrade will make the instance read-only for 1 minute and interrupt connections for a few seconds. Ensure that your client application can retry connections and handle exceptions.
  • The bandwidth of a DCS Redis 3.0 instance will decrease after the upgrade. Check whether the new bandwidth is enough. If not, purchase additional bandwidth later.
  • The instance cannot be restored with existing backup files after the upgrade.

Upgrading Major Version of a DCS Redis 3.0 Instance

  1. Log in to the DCS console.
  2. Click in the upper left corner of the console and select the region where your instance is located.
  3. In the navigation pane, choose Cache Manager.
  4. Click a DCS instance.
  5. On the Basic Information page, click Upgrade Major Version next to Cache Engine.

    Figure 1 Upgrading a major version

  6. Specify Target Version and confirm the bandwidth and price.

    Redis 5.0 or later is recommended.

  7. Click Submit. The upgrade is complete when the upgrade task is in the Successful state.

    Upgrading a DCS Redis 3.0 instance retains the original parameter settings and uses the default settings of added parameters of the higher version.

Parent Topic: Changing an Instance