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Hi all,
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<div>I just would like to bring my experience because I had a similar problem. </div>
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<div>In my case it appears that the mpiexec command takes some times to be executed, and it is not fully completed after the end of instruction “sleep 2” . So the command rm -f SESSION.NAME is executed before full execution of mpiexec. Consequently, nek can’t
find the session file and it searches for nek.rea, which doesn’t exist.</div>
<div>In my case the problem appears for a cpu number > to 4.</div>
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<div>I just added some more seconds to the sleeping time and everything works fine now. "Sleep 5" is reasonable in my case to be able to launch nek on 24 cpus.</div>
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<div>Hope that helps !</div>
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<div>Best regards,</div>
<div>Emmanuel</div>
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<div>On 5 Jun 2014, at 14:11, <<a href="mailto:nek5000-users@lists.mcs.anl.gov">nek5000-users@lists.mcs.anl.gov</a>> <<a href="mailto:nek5000-users@lists.mcs.anl.gov">nek5000-users@lists.mcs.anl.gov</a>> wrote:</div>
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<div>Hi,Paul:<br>
I change this line:<br>
mpiexec -np $2 ./nek5000 > $1.log.$2 &<br>
to<br>
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<div> mpiexec -n $2 ./nek5000 > $1.log.$2 &<br>
in nekbmpi and then changed the name to 'runnek' in each node<br>
Then type ./runnek xxx 48<br>
While the error still exsits.<br>
Xianbei<br>
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At 2014-06-04 11:20:52,<span class="Apple-converted-space"> </span><a href="mailto:nek5000-users@lists.mcs.anl.gov">nek5000-users@lists.mcs.anl.gov</a><span class="Apple-converted-space"> </span>wrote:<br>
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Hi Xianbei,
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<div>Have a look at the nekbmpi script and modify to match the job submission</div>
<div>procedure on your cluster.</div>
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<div>Paul</div>
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<div id="divRpF636972" style="direction: ltr;"><font face="Tahoma" size="2"><b>From:</b><span class="Apple-converted-space"> </span><a href="mailto:nek5000-users-bounces@lists.mcs.anl.gov">nek5000-users-bounces@lists.mcs.anl.gov</a><span class="Apple-converted-space"> </span>[<a href="mailto:nek5000-users-bounces@lists.mcs.anl.gov">nek5000-users-bounces@lists.mcs.anl.gov</a>]
on behalf of<span class="Apple-converted-space"> </span><a href="mailto:nek5000-users@lists.mcs.anl.gov">nek5000-users@lists.mcs.anl.gov</a><span class="Apple-converted-space"> </span>[<a href="mailto:nek5000-users@lists.mcs.anl.gov">nek5000-users@lists.mcs.anl.gov</a>]<br>
<b>Sent:</b><span class="Apple-converted-space"> </span>Wednesday, June 04, 2014 9:34 AM<br>
<b>To:</b><span class="Apple-converted-space"> </span>Nek5000<br>
<b>Subject:</b><span class="Apple-converted-space"> </span>[Nek5000-users] How to run Nek5000 in cluster based on mpich?<br>
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<div style="line-height: 1.7; font-size: 14px; font-family: Arial;">Hi,all:<br>
I have just built a small cluster of computers, based on mpich.I have tested the capability of this cluster, each node can be called freely. Now I want to do my simulation in it, however, I don't know how to run Nek. As known, on only 1 computer, one can
do like this:<br>
nekmpi XXX X<span class="Apple-converted-space"> </span><br>
or<br>
nekbmpi XXX X<br>
while this is not the case in the cluster! I believe most of you have tried this, I'll appreciate if anyone can give me some advice.<br>
Best regards<br>
Xianbei<span class="Apple-converted-space"> </span><br>
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