HP LeftHand P4000 Virtual SAN Appliance Software - Manual (Page 43)

Figure 16 nondestructive rollback example
How this configuration works for nondestructive rollback
You can choose to roll back either the primary snapshot or the remote snapshot. Rolling back one
of the snapshots requires that you delete more recent snapshots of that volume. The other volume
retains the full set of snapshots. You can continue to make snapshots even though one side was
rolled back and the other side was not.
When deciding whether to roll back the primary or remote volume, consider the following:
•
When you roll back the primary snapshot to a primary volume, any applications accessing
the primary volume will no longer have access to the most current data (because the primary
volume has been rolled back to a previous state). If the primary volume must be synchronized
with other volumes accessed by the same application, consider rolling back the remote volume
instead.
Figure 17 (page 44) shows rollback of the primary snapshot while leaving the remote
snapshots intact.
Using Remote Copy for off-site backup and recovery 43