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.

During a master/standby node switchover, services will be interrupted for up to 10 seconds. Before performing this operation, ensure that your application supports connection re-establishment in case of disconnection.
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

Log in to the DCS console.
Click in the upper left corner of the management console and select a region and a project.
In the navigation pane, choose Cache Manager.
In the Operation column of the instance, choose More > Master/Standby Switchover.