On Wed, Nov 28, 2007 at 10:48:22AM +0000, Matthias Scheler wrote:
> On Tue, Nov 27, 2007 at 06:12:01PM -0600, John D. Baker wrote:
> > I've been running NetBSD-4.0_RC? on my file servers for some time and
> > have been seeing lots of "nfs send error 32" messages on the console,
> > clients reporting streams of "nfs server 'foo' not responding", nfs 
> > server 'foo' is alive again.
> 
> Do you use NFS over TCP or UDP?
> 
> NFS over UDP works very badly if the NFS server is faster than the client
> or has faster networking. My NetBSD-i386 NFS server (1Gb/s ethernet)
> managed to make my SPARCstation LX NFS client (10Mb/s ethernet) very
> unhappy until I switched to NFS over TCP.

In my case, the NFS server is much slower than the client, and I suspect
it's the condition to reproduce it. I use UDP, but from what I remember
TCP didn't do better. It's not a buffer size issue one size because
tcpdump shows no NFS traffic when the mount stalls, but the usual
NFS periodic pings

-- 
Manuel Bouyer <bouyer@antioche.eu.org>
     NetBSD: 26 ans d'experience feront toujours la difference
--