Manual update of a SnapMirror destination

Ordinarily, SnapMirror updates the destination automatically according to the update schedule you specify in the /etc/snapmirror.conf file. However, you can also initiate updates manually with the snapmirror update command.

You might need to run an unscheduled update to prevent data loss due to an upcoming power outage, scheduled maintenance, or data migration. You can also include the snapmirror update command in an external script if you want to drive updates using that script.

• Performing a manual SnapMirror update
  To perform an unscheduled SnapMirror incremental update, independent of the schedule in the /etc/snapmirror.conf file, complete the following step.
• Creating extra backup Snapshot copies for SnapMirror qtrees
  You might want to create an extra backup Snapshot copy, on the source and destination in a SnapMirror qtree relationship. These Snapshot copies can serve as the newest common Snapshot copy in case a base Snapshot copy was accidentally deleted. You can also use them to resynchronize a SnapMirror qtree relationship to an earlier resynchronization point.
• What happens after SnapMirror makes incremental updates to the destination
  The destination reflects the changes on the source after SnapMirror completes the transfer. If the SnapMirror transfer is incomplete or interrupted, the changes on the destination are not visible till the transfer is complete. After SnapMirror completes the destination update, you see the changes if you open the file.