On Thu, Dec 09, 2010 at 09:53:25AM +0100, martin f krafft wrote:
> also sprach Jeffrey J. Kosowsky <backuppc AT kosowsky DOT org> 
> [2010.11.17.0059 +0100]:
> > I wrote two programs that might be helpful here:
> > 1. BackupPC_digestVerify.pl
> >    If you use rsync with checksum caching then this program checks the
> >    (uncompressed) contents of each pool file against the stored md4
> >    checksum. This should catch any bit errors in the pool. (Note
> >    though that I seem to recall that the checksum only gets stored the
> >    second time a file in the pool is backed up so some pool files may
> >    not have a checksum included - I may be wrong since it's been a
> >    while...)
> 
> I did a test run of this tool and it took 12 days to run across the
> pool. I cannot take the backup machine offline for so long. Is it
> possible to run this while BackupPC runs in the background?
> 
> > 2. BackupPC_fixLinks.pl
> >    This program scans through both the pool and pc trees to look for
> >    wrong, duplicate, or missing links. It can fix most errors.
> 
> And this?

I don't know about the first one, but BackupPC_fixLinks.pl can
*definitely* be run while BackupPC runs.

For serious corruption, you may want to grab the patch I posted a
few days ago; it makes the run *much* slower, but on the plus side
it will fix more errors.

OTOH, the errors it fixes only waste disk space, they don't actually
break BackupPC's ability to function at all.

-Robin

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