Using Automatic Synchronization

You can use Automatic Synchronization to transfer the data on the Primary to the Secondary over the network. You can synchronize the Secondary using Automatic Synchronization either when the application is active or inactive. Volume Replicator uses the Data Change Map (DCM) and the network to synchronize the data. This method requires sufficient network bandwidth for Volume Replicator to transfer the data. The Secondary remains inconsistent until the synchronization is complete.

The Automatic Synchronization procedure transfers data in the Primary data volumes to the Secondary by reading the Primary data volumes from start to finish and sending the data to the Secondary. If there are multiple updates to the same block, only the last is sent, reducing the load on the network. To use Automatic Synchronization successfully, the network must be sized appropriately.

Note:

Note that the synchronization is complete only if the Primary receives writes at a lesser rate than they can be sent to the Secondary.

If the Primary receives writes at a faster rate than they can be sent to the Secondary, the synchronization might never complete, especially if the writes are dispersed widely in the volume. Depending on the number of volumes and the amount of data that exists, the Automatic Synchronization can take a long time to complete.