Synchronous: Synchronous mode
Remote Copy groups stay synchronized as long as the replication links remain up and available.
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Asynchronous periodic: Asynchronous periodic mode
Remote Copy groups resynchronize at specific intervals using snapshots. Asynchronous periodic is also known as periodic.
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Host write response times is better than in synchronous mode, but data is not always synchronized.
For properly sized replication links, the RPO is two times the replication period selected for the
Remote Copy group. For example, using the minimum replication period of 30 seconds, the minimum RPO is 1 minute.
TIP: A 1 minute RPO is supported in
HPE Primera OS 4.2.
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