On 11/16/2016 03:27 PM, Jean-Philippe Ouellet wrote:
This is a known problem area.
See discussions in:
- https://github.com/QubesOS/qubes-issues/issues/971
- https://github.com/QubesOS/qubes-issues/issues/858
I think the easiest, most efficient route currently available is to have
your VMs stored on a btrfs volume, then use snapshots and 'btrfs send'.
The latter creates a stream that contains the differences from the prior
snapshot, and this stream can be piped to a backup VM. If the backup VM
is untrusted, you can encrypt it in dom0 and have the backup VM store
them as incremental backup files.
A search on 'btrfs send backup' will bring up some guides.
Chris
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