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Chen, Junjie 3b672beb23 DCS UMN 20230208 version 
Reviewed-by: Mützel, Andrea <andrea.muetzel@t-systems.com>
Co-authored-by: Chen, Junjie <chenjunjie@huawei.com>
Co-committed-by: Chen, Junjie <chenjunjie@huawei.com>
2023-06-23 13:27:54 +00:00

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Performing a Master/Standby Switchover for a DCS Instance

On the DCS console, you can manually switch the master and standby nodes of a DCS instance. This operation is used for special purposes, for example, releasing all service connections or terminating ongoing service operations.

Only master/standby instances support a master/standby node switchover.

  • Services may be interrupted for up to 10 seconds during the switchover. Before performing a switchover, ensure that your application supports reconnection.
  • During a master/standby node switchover, a large amount of resources will be consumed for data synchronization between the master and standby nodes. You are advised to perform this operation during off-peak hours.
  • Data of the maser and standby nodes is synchronized asynchronously. Therefore, a small amount of data that is being operated on during the switchover may be lost.

Prerequisites

The DCS instance for which you want to perform a master/standby node switchover is in the Running state.

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. In the Operation column of the instance, choose More > Master/Standby Switchover, then click OK.
Parent topic: Operating DCS Instances