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 -- Linux-User #280138 with the Linux Counter, http://counter.li.org/ ##################### Debian GNU/Linux Consultant ##################### Michelle Konzack Apt. 917 ICQ #328449886 50, rue de Soultz MSN LinuxMichi 0033/6/61925193 67100 Strasbourg/France IRC #Debian (irc.icq.com)
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