My trouble-free BackupPC pool is on an unencrypted LZ4-compressed ZFS pool.
The physical devices are SATA SSDs.
Robert Trevellyan
On Wed, Sep 18, 2024 at 12:23 PM G.W. Haywood <bac...@jubileegroup.co.uk>
wrote:
> Hi there,
>
> On Wed, 18 Sep 2024, Daniel Berteaud wrote:
>
> > But I also triggered it a few years ago on CentOS 8 (don't have the
> > details as I do not have access to this system anymore)
>
> Was there any correspondence on the mailing list at the time? I see
> nothing from your email address. I wonder if any useful details have
> been recorded somewhere. It would especially be interesting to know
> about the filesystem - and in particular if it was encrypted ZFS which
> so far seems to be a common theme, although obviously not conclusive.
>
> You've seen the problem on two different versions of Perl, so I think
> Perl itself might begin to look a less likely candidate, but in both
> cases your versions of BackupPC, BackupPC::XS and rsync-bpc are very
> similar. Although I'm on ext4, here are the versions I'm using:
>
> Debian 'Bullseye' on arm64.
> Perl 5.32.1 - Debian package
> BackupPC 4.3.1 )
> BackupPC::XS 0.59 ) Installed from Github sources, February 2020)
> rsync-bpc 3.1.2.1 )
>
> In your more recent versions there are several potentially interesting
> changes from my older versions.
>
> Maybe others who are using ZFS can let us know their versions/sources?
>
> It might also be useful to get some statistics on the populations of
> the files being backed up.
>
> Have you tried for example setting $Conf{XferLogLevel} to 4 or greater
> to see if there's anything interesting in the logs? I'm sure there
> are other logging-type things which could help narrow this down.
>
> I'd be keen to see the problem reproduced on an unencrypted ZFS. :)
>
> --
>
> 73,
> Ged.
>
>
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