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.

For DCS Redis 4.0 and later cluster instances, if you need to manually switch master/standby nodes on a shard, go to the Shards and Replicas page of the instance. For details, see Managing Shards and Replicas.

• 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.