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 M?heut >> 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 >> >> ---------------------------------------------------------------- >> This message was sent using IMP, the Internet Messaging Program. >> >> _______________________________________________ >> Pw_forum mailing list >> Pw_forum at pwscf.org >> http://www.democritos.it/mailman/listinfo/pw_forum > > -- > ======================================================================= > 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. > > _______________________________________________ > Pw_forum mailing list > Pw_forum at pwscf.org > http://www.democritos.it/mailman/listinfo/pw_forum > -- Merlin M?heut 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 ---------------------------------------------------------------- This message was sent using IMP, the Internet Messaging Program.
