[Pw_forum] parallel compilation on core2duo cluster

[merlin meheut]

Quoting Axel Kohlmeyer <akohlmey at cmm.chem.upenn.edu>:

> On Tue, 2009-04-14 at 23:48 +0200, merlin meheut wrote:
>> Dear pwscf users,
>>
>> I am trying to run pwscf in parallel on a core2duo cluster. It seems
>> to compile fine (I am using mpiifort), and I am able to send a
>> parallel calculation on two cores (therefore two processes but only
>> one processor). Unfortunately, when I want to use more cores, and
>> therefore more than one processor,  for example:
>>
>>   > mpirun -np 4 pw.x -npool 1 < scf.inp
>>
>> this runs four processes but only on two cores, with the following
>> error at the beginning of the output:
>>
>> > You can't run mpdboot on ['compute-0-5'] version of python must be
>> > >= 2.4, current ['']
>>
>> I have been said that this error could be corrected by adding -r ssh, with:
>>
>>   > mpirun -r ssh -np 4 pw.x -npool 1 < scf.inp
>>
>> but actually, this does not make any difference.
>
> of course not. either have a word with your sysadmins.
> it looks as if on the compute-0-5 node is a much
> older version of python installed than what was
> use to compile MPICH-2 or use a different MPI implementation
> that does not depend on python to launch the parallel environment.
>
> cheers,
>    axel.
>
>

Actually, the issue was simply that I could not ssh on the nodes  
without password. Sorry for this post.

cheers,

Merlin


>>
>> Would you have any idea on the origin of this error and how to correct it?
>>
>> Best regards,
>>
>> Merlin Meheut, ESS Department at UCLA
>>
>>
>>
>> --
>> Merlin Méheut
>> professional adress:
>> 595 Charles Young Drive East
>> 3806 Geology Building
>> Los Angeles, California 90095-1597
>> United States of America
>> tel: 310 825 7934
>> cell phone: 310 893 4253
>>
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>
> --
> =======================================================================
> Axel Kohlmeyer   akohlmey at cmm.chem.upenn.edu   http://www.cmm.upenn.edu
>    Center for Molecular Modeling   --   University of Pennsylvania
> Department of Chemistry, 231 S.34th Street, Philadelphia, PA 19104-6323
> tel: 1-215-898-1582,  fax: 1-215-573-6233,  office-tel: 1-215-898-5425
> =======================================================================
> If you make something idiot-proof, the universe creates a better idiot.
>
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--
Merlin Méheut
professional adress:
595 Charles Young Drive East
3806 Geology Building
Los Angeles, California 90095-1597
United States of America
tel: 310 825 7934
cell phone: 310 893 4253

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