CBT: the thread to centralize your feedback

[rtjdamen]

@olivierlambert unfortunatly it did not resolve the stream problem, just got another one.

[manilx]

@olivierlambert I just got this error to on our production pools!

[manilx]

@manilx ticket opened.

[julien-f]

@manilx The incorrect backup size warning is a known issue that we will investigate soon

[manilx]

@julien-f said in CBT: the thread to centralize your feedback:

@manilx The incorrect backup size warning is a known issue that we will investigate soon

[rtjdamen]

@julien-f and the stream error?

[julien-f]

@rtjdamen We are investigating it as well

For the XO backend team, the next few months are focused on stabilization, bug fixes and maintenance

[Andrew]

@julien-f @florent @olivierlambert I'm using XO source master (commit c5f6b). Running Continuous Replication with NBD+CBT and Purge Snapshot. With a single (one) NBD connection on the backup job, things work correctly. With two NBD connections I see some Orphan VDIs left almost every time after the backup job runs. They are different ones each time.

[flakpyro]

I noticed when migrating some VDIs with CBT enabled from one NFS SR another that the CBT only snapshots are left behind. Perhaps this is why a full backup seems to be required after a storage migration?

[rtjdamen]

@flakpyro i know from our other backup software we use that migrating cbt enabled vdi’s is not supported on xen, when u migrate between sr it will disable cbt on that vdi. This is causing a new full. This is by design

https://github.com/vatesfr/xen-orchestra/pull/7756

[flakpyro]

@rtjdamen Makes sense, it would be nice is XOA cleaned up these small CBT snapshots though after a migration from one SR to another.

[rtjdamen]

@flakpyro indeed, sounds like a bug. It should delete the snapshot, disable cbt and then migrate to the other sr.

[Tristis Oris]

I've been out of life for a while.
is it any known problem with CBT file restore?

[manilx]

@Tristis-Oris Working fine here, with cbt backups.

[Andrew]

@Tristis-Oris Is your backed up VM using LVM for it's root filesystem?

[Tristis Oris]

@Andrew most of them, yes.

[Andrew]

@Tristis-Oris This is a known issue from before and not related to CBT backups.

Message Posting File restore error on LVMs

File level restoration not working on LVM partition #7029
(https://github.com/vatesfr/xen-orchestra/issues/7029)

[Tristis Oris]

@Andrew got it. i miss that ticket.

[manilx]

@Andrew ext4 or windows

[frank-s]

Hi, I am running from the sources and I'm almost up to date (991b4) . Can anyone please tell me what this means "Error: can't create a stream from a metadata VDI, fall back to a base". Restarting the backup results in a full backup rather than an incremental.
Thanks.