NFS consistency problem?

[Trond Myklebust]

On Mon, 2007-05-07 at 12:32 +0200, Jonathan Schmitt wrote:
> Dear all,
> 
> I'm using nfs4 with gss/kerberos authentification and I'm having a consistency 
> (cache coherency?) problem.
> 
> One user A modifies a file on one computer, a second user B views this file 
> but is left with a non-updated version of this file. 
> 
> A umount/mount of the directory solves the issue. Also, if user B now decides 
> to modify the (non-updated) file and saves the modification, user As changes 
> get overridden and from then on A as well as B see the modifications of B.
> 
> Both, clients as well as server are setup with Debian Sarge, the underlying 
> file system on the server is ext3, the nfs server is the kernel-server (v 
> 1.0.10). Server as well as clients use nfs-utils v1.0.10.
> 
> exports are done with option
>   async rw fsid=0 insecure no_subtree_check anonuid=65534 anongid=65534
> 
> mount is done with options
>   auto rw sec=krb4
> 
> I've tried to find info on this, but maybe I'm just to unfamiliar with the 
> vocabulary so that I don't get any useful results. If this is a known 
> problem, could someone point me to the correct search phrase, please?
> 
> Any ideas?
> 
> Kind regards,
> Jonathan

You have of course read http://nfs.sourceforge.net/#faq_a8 ?

Trond