I send a extract of tcpdump.  It seems that the problem is in the file attribues o locks of nfs.  I changed fstab on clients to add these options:

nfsvers=3,rw,bg,noac,rsize=8192,wsize=8192

but nothing has improved.

"Antonio J. Peña" <apenya@mcs.anl.gov> escribió:

I don't think this is helping. Maybe tcpdump / wireshark captures could be helpful.

  Antonio


On 12/02/2013 11:44 AM, Bixente BODO GOMEZ wrote:

The attachment...


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-- 
Antonio J. Peña
Postdoctoral Appointee
Mathematics and Computer Science Division
Argonne National Laboratory
9700 South Cass Avenue, Bldg. 240, Of. 3148
Argonne, IL 60439-4847
(+1) 630-252-7928
apenya@mcs.anl.gov
www.mcs.anl.gov/~apenya

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discuss mailing list     discuss@mpich.org
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-- 
Antonio J. Peña
Postdoctoral Appointee
Mathematics and Computer Science Division
Argonne National Laboratory
9700 South Cass Avenue, Bldg. 240, Of. 3148
Argonne, IL 60439-4847
apenya@mcs.anl.gov
www.mcs.anl.gov/~apenya