Re: "serious issues with the 2.6 NFS server" (was: Re: Mail clustering)
On Tue, Mar 20, 2007 at 05:53:33PM -0600, Michael Loftis wrote:
> >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.
i saw a talk by Greg Banks of SGI at the last Linux Users of Victoria
meeting a few weeks ago. he's been working hard on 'making nfs suck
faster'. lots of info about performance improvements and bug fixes.
the talk was a repeat of a talk he gave at linux.conf.au and can be
found here:
http://lca2007.linux.org.au/talk/41
dunno if it's relevant to the problems you experienced or not...
craig
--
craig sanders <cas@taz.net.au>
BOFH excuse #153: Big to little endian conversion error
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