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Re: [BackupPC-users] Disk space used far higher than reported pool size
2013-11-01 11:17:08
"Craig O'Brien" <cobrien AT fishman DOT com>
wrote on 11/01/2013 09:48:23 AM:
> > This error shows BackupPC_dump segfault, and pointing to libperl.so
> > How do you install your BackupPC ? From
source or from RPM?
>
> I did a yum install backuppc, which got it from epel
That's how I do it.
> > That tells you it was unmounted cleanly
last time, not that
> everything checks out OK.
> > Try it with the -f option to make it do
the actual checks.
>
> bash-4.1$ fsck -f /dev/sda1
> fsck from util-linux-ng 2.17.2
> e2fsck 1.41.12 (17-May-2010)
> Pass 1: Checking inodes, blocks, and sizes
> Pass 2: Checking directory structure
> Pass 3: Checking directory connectivity
> Pass 4: Checking reference counts
> Pass 5: Checking group summary information
> /dev/sda1: 20074505/2929688576 files (0.3% non-contiguous),
> 2775975116/2929686016 blocks
> bash-4.1$
Good. I think we've eliminated a disk or filesystem
issue. I think we're pretty comfortable it's a BackupPC corruption
issue. It was hard to tell when your error messages said that it
could not seek to a particular point in a file.
> > What distro are you using? (I
use CentOS/RHEL)
>
> CentosOS release 6.4
Same here.
> > I think that segfault in a perl process
needs to be tracked
> down before expecting anything else to make sense.
> > Either bad RAM or mismatching perl
libs could break about anything else.
>
> I installed perl-libs with yum as well. A yum info perl-libs tells
> me it was installed from the updates repo
>
> I think what I'm going to try at this point is to delete the bad
> backups, reinstall perl from epel, and keep an eye on it to see if
> it balloons up again. Thanks for all your help!
That's a very reasonable, if not very subtle, solution.
I think you need to monitor /var/log/messages for
errors that mention backup. See if the crash returns. Jeff
is (justifiably) worried that the crash caused your corruption, but it
could just as easily be the other way around. Once you clean up from
this, you want to make sure that nothing comes back.
If you've got the time, running memtest for a weekend
might be a good idea, too. The only thing it would cost is the downtime...
Tim Massey
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