[Lustre-discuss] WARNING: data corruption issue found in 1.8.x releases

[Robin Humble]

On Thu, Sep 10, 2009 at 12:35:54PM +0200, Johann Lombardi wrote:
>We have attached a new patch to bug 20560 which should address your
>problem which may happen in rare cases with partial truncates.

as we are about to throw users onto the new system, can I ask for a
quick update pointing us to the current best guess at a workaround/fix
for the 1.8.1 read cache problems please?

to me it looks like
  https://bugzilla.lustre.org/show_bug.cgi?id=20560
is still evolving, but it looks like writethrough_cache=0 should now
work (and not crash the OSS) with attachment:
  https://bugzilla.lustre.org/attachment.cgi?id=25833

so if I patched our OSS's with just this one liner, then would that be
enough to run with until the situation has had some time to bed in?
or would we be better off with all 4 patches from 20560 applied (and
both read cache's still off)?

cheers,
robin
--
Dr Robin Humble, HPC Systems Analyst, NCI National Facility