VMs freezing and unreachable when backup server is slow

christian.g

Member
Jun 4, 2020
35
15
13
We are having a hard time too. The combination of dirty maps in conjunction with a mid-fast PBS is giving us nightmares. We have > 40 VMs and also have a few VMs which are quite big database servers (>3TB). Sometimes they need updates and a reboot is required, which in turn invalidates the dirty maps and a full backup is the result. This again delays the whole backup of all other VMs on the node and makes those database VMs unusable for hours. And hard resetting such big database server and log recovery make things even worse.

Is there any design progress?
What about incorporating Ceph Snapshots if Ceph is in use instead of using qemu dirty maps?
I know you try to make a solution which works in every case an hence use qemu but these blocker/delays/freezes/hard resets are a big problem.
 
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