From: Julian Rogan (Julian.Rogan@Unilever.com)
Date: Wed Jun 26 2002 - 08:33:27 EDT
The reply from Bill Hassell covers the topic well so I will just pass that
one on.
Many thanks to all the other who replied.
Julian
-----Original Message-----
From: Bill Hassell [SMTP:blh@freedom.atl.hp.com]
Sent: 25 June 2002 11:21
To: Julian.Rogan@Unilever.com
Subject: Re: [HPADM] Stale NFS mounts in a Service Guard Environment
Hi,
> I have a V 11.0 Service Guard Cluster. This cluster uses NFS to mount
> directories from the database server on to the application server.
Ooohhh, NFS and production servers are not a good choice (as you've
seen).
> Today we have noticed that all of the NFS mounts are showing stale NFS
> handles. The only thing that has been changed is that yesterday the
> auto-mounter was configured to mount some remote file systems.
Automounter is a real kludge that I would reserve ONLY for small
workstations. If you are running MC/SG, you want 100% uptime and
NFS just won't provide that. It could be a temporary problem with
the network, with DNS, with the NFS server, etc...all of which will
be detrimental to the health of the production systems.
> Is there a known problem using the automounter with standard NFS mounts
> and is there a way to refresh the mounts without rebooting?
Don't use automounter at all. There is no point as these are production
systems. Ensure that nsswitch.conf always points to hosts first, then
DNS. Make sure the NFS server is 100% up all the time. The network
must never be overloaded and should be redundant. If you are up to
date on patches, you can force the filesystem to umount. Not always
successful since you have to find every user that cd'ed into an NFS
mountpoint and get them out or kill them. You'll also need to stop
all processes that have files open on the stale NFS mount.
--
Bill Hassell
Remote Engineering Services
HP Atlanta Response Center
email: blh@atl.hp.com
--
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