Hi there,
On Mon, 16 Sep 2024, Daniel Berteaud wrote:
I tried 3 times to wipe and start from empty pool, but this comes
back everytime. So there's a bug in BackupPC.
Even if it isn't in ZFS it still might not be in BackupPC. It might
be in one of the modules used by BackupPC or it might even be in the
Perl interpreter itself. Did you tell us the versions you're using?
On Tue, 17 Sep 2024, Daniel Berteaud wrote:
----- Le 16 Sep 24, ? 18:08, G.W. Haywood bac...@jubileegroup.co.uk a ?crit :
> ...
> Does ZFS work on Linux now? That's a genuine question, not some way
> of trying to goad ZFS lovers.
ZFS on Linux is rock solid for several years now.
Several other posters have now chimed in with their experience of
BackupPC/ZFS/Linux and it seems they're happy enough with it.
>> ... encounter this kind of errors systematically. It's not a
>> corruption due to some hardware fault, but clearly a bug in
>> BackupPC.
>
> As I've said before, but I'll repeat, I don't have any BackupPC axe to
> grind but Mr. Kosowsky and I both think that what you're seeing looks
> like filesystem corruption.
And I'm 100% sure it's not. Brand new hardware, reproducible ...
As we now have other posters using ZFS on Linux with BackupPC who
don't seem to have the problems you're having, there must be a way to
find out what it is that you're doing that they aren't doing. Or it
might be what they're doing that you aren't doing. Or something. As
it happens for you, but not for others who have posted here recently,
I wonder if it might even be a Perl problem. Probably I'd start with
listing the versions of BackupPC, Perl, and all the Perl modules, any
shared objects etc. used, to see if you're using a version of something
which is different from the others. Maybe there's an XS issue.
> Also I'd say that in a previous post you described a whole lot of what
> appeared to me to be completely unnecessary thrashing of storage media
> in (something like) the interests of reliability.
Not sure which post you're refering to.
Apologies, my mistake - it was a different poster.
> ...fire up a system using ext4, don't do anything fancy with it,
> run it in parallel with your ZFS version ...
And that's what I'll be doing, running BackupPC on XFS, ...
XFS. Hmmm. Well, all right then, if you must. For now. :/
Anyway, BackupPC seems to become abandonware, so I'll probably
migrate to restic sooner rather than later.
It's definitely a concern with a lot of Perl projects thesedays, but
if BackupPC looked like being abandoned I'd be happy to take it on as
the maintainer myself because I've used it so extensively for so long.
I'd be surprised if others on this list wouldn't also step up.
--
73,
Ged.
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