Failing over a replication session includes switching roles between the source and destination systems and reversing the direction of the replication session.
There are two types of failovers:
Planned failover - Initiated by the user. Includes synchronization between source and destination to prevent data loss.
Unplanned failover - Initiated by the destination system in response to source system failure.
During a replication session failover, the system performs the following actions:
Stop I/Os on the source object.
Synchronize the source and destination storage objects (occurs only in a planned failover).
Stop the replication session.
Reverse roles between source and destination systems.
Promote the latest object version on the new source.
Resume I/Os on the new source (initiated by the user).
For a planned failover, if specified by the user, reprotect.
After a failover, you can access applications on the new source system to recover data.
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