Follow these steps to backup your VMware Aria Automation 8.x appliance using online snapshots.
You must back up all VMware Aria Automation appliances, at the same time - simulataniously for all nodes.
If you are making the snapshots manually, you must start the snapshots of the second and the third node not more than 40 seconds after you start the snapshost for the first node.
When you back up the VMware Aria Automation appliance, disable in-memory snapshots and enable quiescing (quiescing is a requirement only for version 8.9 and newer).