Question on backup of a network monitoring vm

Jan 29, 2026
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Hello!

I have a Proxmox 9.1 cluster with ceph running multiple vm's, and when I use the native PVE Backup to backup my network monitor to a NAS via NFS, it causes alarms for the duration of the job from PagerDuty that listens to the monitor. I do have Qemu agent running in the vm, and I have tried snapshot and suspend backup types with and without fleecing but get identical results.

The issue appears to be added latency to pings hitting monitored devices; I am guessing I am looking at either I/O pressure (even with fleecing) or the FS freeze causing this?

Has anyone run into similar issues and overcome them?

Thanks!