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Huge amounts of data being sent FROM backup server, to shadow protect client(s)
We are using shadowprotect server on a few servers that back up to a remote backup server:
Server 1: 260gb continuous incrementals
Server 2: 150gb once-weekly full backup - disabled on the client
Server 3: 90gb once-weekly full backup - disabled on the client
(the above is the backup size btw)
I can understand data being sent from these servers to the backup server is large. What I can't understand is why, at seemingly random times of around once or twice a month that I'm seeing HUGE amounts of data being sent FROM the backup server TO these clients?! For example, a couple of days ago it decided to send 325gb from the backup server to the client resulting in an awesomely huge bill from our cloud provider.
This is not the first time it's happened. It happened about a month or so ago. The backup server has image manager installed so I completely stopped and disabled the service, thinking that it's somehow verifying the backup.
Does anybody know why this would happen? It appears it's sending more data back to the client than is being backed up. If I was to guess, it's probably some "image verification" going on to make sure that the backup is valid and working.