Help Center/ Distributed Cache Service/ User Guide (Kuala Lumpur Region)/ Operating DCS Instances/ Upgrading the Minor Version of a DCS Instance
Updated on 2025-11-14 GMT+08:00
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Upgrading the Minor Version of a DCS Instance

DCS optimizes functions and fixes vulnerabilities in minor upgrades. This section describes how to upgrade the minor version of an instance.

Upgrading the minor version does not affect the instance connection addresses, password, whitelist, or monitoring and alarms.

Notes and Constraints

  • Available for DCS Redis 4.0 and later instances.
  • An instance can be upgraded to the latest minor version which cannot be specified.
  • To upgrade the minor version of a Redis Cluster instance, ensure that the client can properly process the MOVED and ASK commands. Otherwise, requests will fail.
  • Rollback is unavailable.

Impacts

  • Perform instance upgrades during off-peak hours. Otherwise, upgrades may fail when the instance memory or CPU usage exceeds 90% or write traffic bursts. In such cases, try again during off-peak hours.
  • The instance's minor version is upgraded by migrating nodes. During the migration, latency will increase. A migrating shard will become read-only for 1 minute and intermittently disconnected. Ensure that the client can reconnect and handle exceptions.

Procedure

  1. Log in to the DCS console.
  2. Click in the upper left corner and select a region and a project.
  3. In the navigation pane, choose Cache Manager.
  4. Click a DCS instance.
  5. In the Basic Information area, click Upgrade next to Minor Version.
  6. Click OK. The upgrade is complete when the upgrade task is in the Successful state.
Parent topic: Operating DCS Instances