[Pw_forum] parallel compilation on core2duo cluster

[Axel Kohlmeyer]

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. 


> 
> 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
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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
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If you make something idiot-proof, the universe creates a better idiot.