[PATCH 4/4] backup: Allow configuring incremental backup per-disk individually
eblake at redhat.com
Tue Jul 7 19:54:57 UTC 2020
On 7/7/20 10:23 AM, Peter Krempa wrote:
> The semantics of the backup operation don't strictly require that all
> disks being backed up are part of the same incremental part (when a disk
> was checkpointed/backed up separately or in a different VM), or even
> they may not have an previous checkpoint at all (e.g. when the disk
> was freshly hotplugged to the vm).
> In such cases we can still create a common checkpoint for all of them
> and backup differences according to configuration.
> This patch adds a per-disk configuration of the checkpoint to do the
> incremental backup from via the 'incremental' attribute and allows
> perform full backups via the 'backupmode' attribute.
> Note that no changes to the qemu driver are necessary to take advantage
> of this as we already obey the per-disk 'incremental' field.
> Signed-off-by: Peter Krempa <pkrempa at redhat.com>
> - backupmode=full incremental="..." is now rejected by the RNG
> - test output changes as we now validate virDomainBackupAlignDisks
> - typo fix
Reviewed-by: Eric Blake <eblake at redhat.com>
Eric Blake, Principal Software Engineer
Red Hat, Inc. +1-919-301-3226
Virtualization: qemu.org | libvirt.org
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