[pbs-devel] Slow overview of existing backups

[Roland]

hello,

yes, this is really slow, i even observed timeouts (backup list simply
won't appear without any notice) when querying pbs while another node is
running a backup

 > I have the feeling that when you request an overview now, all
individual backups are checked, which seems suboptimal.

yes, but did you know that zfs metadata caching sucks and this may also
be one reason for slowness?

see https://github.com/openzfs/zfs/issues/12028

there is improvement on the way:

https://github.com/openzfs/zfs/pull/14359

regards
roland

Am 25.01.23 um 11:26 schrieb Mark Schouten:
> Hi,
>
> Requesting the available backups from a PBS takes quite a long time.
> Are there any plans to start implementing caching or an overal
> index-file for a datastore? PBS knows when something changed in terms
> of backups, and thus when it’s time to update that index.
>
> I have the feeling that when you request an overview now, all
> individual backups are checked, which seems suboptimal.
>
> Thanks,
>
> —
> Mark Schouten, CTO
> Tuxis B.V.
> mark at tuxis.nl / +31 318 200208
>
>
>
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