[Samba] GFS bug hits Samba (was: locking.tdb: expand_file ftruncate to 8192 failed (Permission denied))

Axel Thimm Axel.Thimm at ATrpms.net
Thu Sep 22 13:52:34 GMT 2005

On Thu, Sep 22, 2005 at 10:15:08AM +0200, Axel Thimm wrote:
> On Wed, Sep 21, 2005 at 04:34:32PM -0700, Jeremy Allison wrote:
> > Why are you putting the locking db on a GFS filesystem anyway. That's
> > madness !
> The reason is to have a poor-man's-clustered-samba by placing lock and
> private dir on a common share and have the relocated smbd/nmbd pairs
> access them. E.g. relocating within the cluster is effectively like
> restarting smbd/nmbd on a node.
> On Wed, Sep 21, 2005 at 04:37:32PM -0700, Jeremy Allison wrote:
> > As I said, I bet GFS isn't POSIX complient. Don't put locking
> > tdb's on anything but local filesystems.
> Well, GFS claims to be POSIX and local-like in any way. Maybe it is
> just a bug in GFS?

It turns out that's exactly what it is:


GFS is in fact a local fs. It is just local for several SAN nodes at
the same time using dlm for coordinating locking. GFS can even be used
as a non-clustered local fs, just like ext3, where the same bug hits

I hope the bug gets fixed soon. Otherwise, does this hit more than

Axel.Thimm at ATrpms.net
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