Snapshots are not a backup solution, should only be used as a temp roll back when applying new patches, have it running for a day no issued then delete the snapshot. But a backup should still be made before any changes on the server, snapshot is justs a quick roll back if needed.
No this is not very efficient
You should look at a proper backup solution with VCB or other backup solutions
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VCDX #201
Author of Mastering vRealize Operations Manager
