Dell PowerStore Protecting Your Data

Asynchronous replication is a replication mode in which updates to the destination system (such as changes in content, size, and membership) occur at a set interval that is based on the defined RPO. During synchronization, the destination system is updated with all the data changes that occurred since the last synchronization cycle.

PowerStore supports asynchronous remote replication for volumes, volume groups, NAS servers, and virtual volumes.

To apply asynchronous replication to a storage resource, assign the resource with a protection policy that includes an asynchronous replication rule. Assigning a protection policy creates a replication session which is added to the replication sessions list (Protection > Replication), and the Replication Type column displays Asynchronous.

Synchronization can occur either automatically - according to a set schedule - or manually. Snapshots are synchronized from the source system to the destination system, and maintain block sharing efficiency.

You can manually initiate a synchronization of a replication session at any point by selecting the replication session and then selecting Synchronize. The replication session must be in one of the following states:

• Operating Normally
• System Paused

While a replication session is being synchronized, you can take the following actions:

• Perform a planned failover from the source system.
• Perform a failover from the destination system.
• Pause replication sessions from the source or destination system.
• Delete a replication session by removing a protection policy.

For a summary of asynchronous replication attributes and comparison to synchronous replication and metro, see Replication summary.