Synchronizing VOB replicas more efficiently

You can configure synchronization updates to send only the necessary operations to another replica. Although sending an operation multiple times does no harm, packet creation and transmission is more efficient if you exclude operations that have already been imported at the receiving replica.

The chepoch –actual and sync_export_list –update commands contact a remote replica and update your current replica’s record of the state of the remote replica.

The primary use of these commands is to resend lost packets, but you can also use them to increase synchronization efficiency. However, depending on your synchronization pattern and schedule, these commands can decrease efficiency.