CBT: the thread to centralize your feedback
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@julien-f Updated to Xen Orchestra, commit 1ace3
Running my delta backups now all worked without issues. Also Coalesces finished fine.
The only thing I note is that there is always one (or +1) tasks showb when there is actually none running:
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@manilx It may be a normal task that's hidden (like SR or ISO scan). Clear out the search box by just clicking on the X. It should show all tasks.
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@rtjdamen Yes
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@olivierlambert just updated, we will run some jobs with snapshot destroy and will report the results
Compliments to all involved fot this great improvement is such a short time!
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How do I get rid of this one?
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@manilx restart toolstack did it. Thx for pointing this out
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@rtjdamen That was a big sprint
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@olivierlambert indeed but the first version is here!
I allready noticed some strange behavior, when a backup job is running with both switches on (cbt and data destroy), the first run the job processes succesfull but some snapshots stay orphan after the job is finished and coalesced. @florent any idea what is causing this?
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@olivierlambert With today's update (feat: release 5.96.0, master 96b7673) things are working well again. I have not seen any Orphan VDI/snapshots or stuck Control Domain VDIs (but it may take time to test). Thanks to the Vates team!
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@Andrew need to do some more testing but second run does clean them out, keep u all posted on the results over the weekend!
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I did some digging on this orphan snapshots. i found this error in the backup logging for these vms
Couldn't deleted snapshot data
error
{"code":"VDI_IN_USE","params":["OpaqueRef:d52c23f7-4008-45e0-9852-6ecb3aeb8567","data_destroy"],"call":{"method":"VDI.data_destroy","params":["OpaqueRef:d52c23f7-4008-45e0-9852-6ecb3aeb8567"]}}
vdiRef
"OpaqueRef:d52c23f7-4008-45e0-9852-6ecb3aeb8567"i do not see them currently on normal vms and also not on second run
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It worked just fine for me during an overnight unattended backup. I also did a manual backup to watch things.
Couple questions:
- If NBD is used, is there a 100% chance that CBT will also be used, or is it possible to have a NBD backup without CBT?
- Can it be added to the xo-server-backup-reports emails that NBD/CBT was used?
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It seems the orphan vdi is showing when the data_destoy fails, maybe the vdi is not yet ready? @florent Is this something you can look into? Maybe a retry when it fails?
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most of backup succed, but few suddenly looks like:
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From what i have seen if CBT fails for some reason, the chain is broken or the metadata is missing it will fall back on single NDB, most likely a new full.
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Enabling the new Purge snapshot data when using CBT on Delta backups
results in
cleanVm: incorrect backup size in metadata. But it seems to be successful anyway.
Update: I'm getting this regardless of what "Purge snapshot data when using CBT" is set to. So I'm right now not sure about what causes it.XOsource: commit 96b76. ?
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[NOBAK] tag is ignored with CBT patch.
before update it works fine. no 2nd disk available for restore.
my share is run out of space)
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@Tristis-Oris is it any way to remove only 1 disk backup chain, to not wait rotation? i can't just clear everything.
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@ajpri1998 IIRC:
- CBT will be enabled as soon you use NBD, no other choice (having 2 different code paths was too prone to problems and bugs, without forgetting the initial VHD diff code)
- Sure, we can do that! Telling @Bastien-Nollet about it
