Am 2007-03-20 17:53:33, schrieb Michael Loftis:
> --On March 21, 2007 12:26:45 AM +0100 Maximilian Wilhelm <max@rfc2324.org>
> >Could you tell me/us about the serious problems with NFS server on
> >linux 2.6?
>
> Basically under high load the NFS server would very randomly start telling
> the clients permission denied on inodes. This was tested with debian stock
> 2.6.8 and kernel.org kernels 2.6.8, .9, and IIRC also .10. I was never
> able to adequately pin down exactly what was causing it, nor get it into a
> reliably reproducible state in a lab setup so I had to give up digging at
> it.
>
> It was fine under low transaction rates, but once the rates started to pick
> up it was like there was a locking issue or a contention issue going on
> where the nfs kerneld would return errors randomly to the clients on
> directories they clearly had access to.
>
> For a lot of people it may be fine, but under high load it fell apart. No
> real idea why which was the dismaying part. No OOPSes or any other
> misbehavior, just random nfs calls denied.
I am running now on all Mailservers Etch but with selfcooked 2.4.33
and I can confirm, that Linux 2.6 has definitivly a NFS problem.
I use 5 NFS-Servers with currently 17.000 users in summary and over
200 million messages.
I have never had any problems with Hardware even by using Raid-5
with ICP-Vortex Controlers but Linux 2.6. I have tried to use
2.6.16, 2.6.18 and 2.6.20 without luck.
Thanks, Greetings and nice Day
Michelle Konzack
Systemadministrator
Tamay Dogan Network
Debian GNU/Linux Consultant
--
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