[KLUG Members] NFS problems viewing subdirectories

[Adam Tauno Williams]

> Unfortunately, rebooting is not an option. Actually, unmounting and
> mounting (couldn't even do a mount -o remount) was the only thing that
> worked. That is not acceptable either. This is our production server and
> these directories have to be accessible 24/7.

While I've never seen this the first thing I would try would be to
manually specify the nfs block size and version in the mount entry.
nfsvers=3,rsize=8192,wsize=8192

If your server side has the filesystem mounted with acl support try
adding that to your client mount as well (option "acl").

If you're doing a LOT of I/O over NFS you might want to bump up the
number of biod workers.

"You can tune the number of server threads via the sysconfig-variable
USE_KERNEL_NFSD_NUMBER." this is in /etc/sysconfig/nfs

> Ah well, for now we put things back the way they were, which was having
> the data on the server instead of an nfs mount.
> My partner in crime is going to look at a samba share since we are
> needing to do two servers with ip failover and we wanted the shared data
> which is not controlled by cvs to be truly shared.

Have you looked at something like GFS?  Or placing the data on a
crosslinked SAN?