TDB corruption with Samba 2.2.3a

[Martin Apel]

On Wed, 13 Mar 2002, Jeremy Allison wrote:

> On Wed, Mar 13, 2002 at 05:25:13AM -0500, ZINKEVICIUS,MATT (HP-Loveland,ex1) wrote:
> > We are also experiencing the TDB corruptions, as reported in the samba log
> > files. At first there didn't seem to be an consequence, but we are now
> > beginning to see user's not being able to login to the machine. As a
> > workaround we have been just deleting the secrets.tdb file, restarting
> > samba, and rejoining the domain.
> >
> > Our server if very similar to Martin's (Samba 2.2.3a + Linux 2.4.17 + XFS).
> > I'll post more details soon.
>
> Can you try using the tdbbackup utility periodically
> to determine when the corruption may be occurring ?

I let the tdbbackup run for a few days now. The TDB corruption seems to
happen at the time, when Amanda (a great backup tool) starts to run.
I have moved the Amanda start time back and forth and the corruption
starts within 10 minutes after starting Amanda.
I don't think it's Amanda's fault, I assume that Amanda puts a heavy load
on the filesystem layer during the first minutes, when it does its estimates.
A reminder: all partitions on this system are XFS partititions, including
/var, where Samba stores the TDB files.
I could try to reformat the /var filesystem with ext2 to see if this has
any influence. But this will probably need a server reboot, so I cannot
do this before the weekend.

Martin