CBT: the thread to centralize your feedback
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For our production pool i have CBT + NBD enabled but i have "Purge snapshot data when using CBT" disabled. The results in successful backups but the snapshot is retained. I assume it then ends up using that snapshot for the following delta backups.
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@flakpyro ah I will try that once proxy for that pool is back
We upgrade XOA from stable channel to latest as we had another issue which is apparently resolved in that with NBD (causing some machines to go RO)
Once thats fixed I will try again to see if the above update and/or disabling "Purge snapshot" works as a workaround.We have purge enabled (and would like it left enabled) as we use iSCSI (Dell SC5020's) so everything is a little fat, especially with some clients.
I shal update tommorow on what happens. -
@Rhodderz I agree we are using NFS so snapshots are thin at least but we would love to be able to delete the snapshots after a backup run as well. Hopefully in time we can get this working!
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To add an update and to not leave on a cliff hanger.
We have since updated our XOA to the latest channel to attempt to fix an NBD issue.
This move broke a proxy of ours, but also all the backups are going through the XOA and after this the backups have not had an issue since.
So either the new NBD fixes, it being only on an XOA or something somehwere else resolved this problem for now.We will be enabling the same in our other pool soon so will update if we have the same issues there.
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Sadly the latest XOA release from today does not resolve my strange CBT issue,
[08:32 xcpng-test-01 45e457aa-16f8-41e0-d03d-8201e69638be]# cbt-util get -c -n 4d7f0341-bbce-4957-a4c4-d603725a807a.cbtlog 1950d6a3-c6a9-4b0c-b79f-068dd44479cc After Migration from Host 01 to Host 02 (Shared NFS SR): [08:33 xcpng-test-01 45e457aa-16f8-41e0-d03d-8201e69638be]# cbt-util get -c -n 4d7f0341-bbce-4957-a4c4-d603725a807a.cbtlog 00000000-0000-0000-0000-000000000000 -
I don't think that's an XO issue, but more something weird in your XCP-ng setup that nobody can reproduce
(but it doesn't mean we couldn't solve it) -
@olivierlambert Hmm im really not sure whats unique about my two pools. One is AMD + TrueNAS the other Intel + Pure Storage. If this is actually unique to me only perhaps i would be better off submitting a ticket to help get to the bottom of this?
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You manage to find a CBT issue without using any XO command, which is great because we know it's not XO now
I think @dthenot is already taking a look internally. -
@olivierlambert I am
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@dthenot @olivierlambert thanks guys ill hold off on submitting a ticket for now to keep the conversation centralized here but if you need any more info, would like me to try anything or would like a remote support tunnel opened just let me know!
