recover mangled guest files

stepping up from openvz to kvm and gluster.

openvz was configured to store everything as just files, not ploops, so
backuppc was entirely sufficient, tho, on-site only.

gluster provides offsite capability, but iiuc won't help resurrect old
versions.

snapshotting can keep old versions, tho offhand i doubt it holds up as a
practical approach to keeping backups.  but maybe?  virsh snapshots might
be significantly superior to lvm snapshots?  i'm all ears regarding your
experience.

what do folks recommend, that's libre, and makes it reasonable to recover
back versions of files from any of a number of kvm guests?

i can see setting up each guest to work with backuppc, but now is the time
to consider alternatives, if there are alternatives worthy of considering.

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