Re: libvirt 7.2.0 domainbackup
On Thu, Apr 08, 2021 at 15:53:14 +0200, Thomas Stein wrote:
Cool! So just to be clear, if I start the backup at 1400 and it's
finished at 1410, changes to the image at 1405 are not included?
Yes, exactly.
It's the same quality as my current backup solution then. Thank
you for your answer Peter.
If you do full backups (create just 1 overlay, copy over the full
original image, merge the 1 overlay back) then yes. If you were doing an
"incremental" backup (2 overlays when backing up, 1 overlay in normal
use) then that is not yet supported. The code for incremental backups
via 'virsh backup-begin' exists in libvirt but qemu doesn't yet support
the 'blockdev-reopen' command which is used by the incremental backup
code.
cheers, t.
Am 8. April 2021 15:46:56 MESZ schrieb Peter Krempa <pkrempa(a)redhat.com>:
>On Wed, Apr 07, 2021 at 19:46:54 +0200, Thomas Stein wrote:
>>
>> Got a little bit further. "virsh backup-begin jitsi jitsi-backup.xml"
>works
>> and I have a backup file now. VM was running all the time. Question.
>Is it
>> save to use this function this way? Currently I do:
>
>The backup file you'll get will represent the state of the VM at the
>time the backup operation has started, but should contain a full copy
>of
>the image from that time.