MSSQL server backup chain becomes broken after snapshot backup

Andrii Pavlikovskyi

New Member
Sep 26, 2018
Proxmox VE 5.3
Windows Server 2016 VM (Qemu Agent enabled)
SQL Server 2016
Backup conf:

Inside Windows Server 2016 VM I have an app which runs MSSQL backups - a full backup once per week and differential backup once per day.

After Proxmox makes a snapshot, MSSQL backup chain becomes broken so I can't use differential backups. Tried to Google it but found nothing. Any suggestions?


May 28, 2018
In my scenario (with daily zfs-auto-snapshots) I'm also using additional Windows VM diffential backup tool for some data folders. Anyway seems that each differential backup takes pretty much same ammount of disk space as a regular "full" backup...

On the other hand making a data backup under VM (with atchive atributes update) also affects ZFS snapshot size.

Multiple layered backups seem to affect each other (@ least in some cases/scenarios) unless you figure it out precisely...


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