Help Center> Distributed Cache Service> FAQ> Master/Standby Switchover> When Does a Master/Standby Switchover Occur?
When Does a Master/Standby Switchover Occur?
A master/standby switchover may occur in the following scenarios:
- A master/standby switchover operation is initiated on the DCS Console.
- A master/standby switchover will be triggered when the master node of a master/standby instance fails.
For example, if commands (such as KEYS) that consume a lot of resources are used or logs are aged and deleted in batches, the CPU usage will surge, triggering a master/standby switchover.
- If you restart a master/standby instance on the DCS console, a master/standby switchover will be triggered.
After a master/standby switchover occurs, you will receive a notification. Check whether the client services are running properly. If not, check whether the TCP connection is normal and whether it can be re-established after the master/standby switchover to restore the services.
Parent topic: Master/Standby Switchover
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