Thank you very very much Gus. Does this mean that OpenMPI does not copy the executable from the master node to the worker nodes? If that's case, I will go ahead and NFS mount my working directory.
~Belaid. > Date: Tue, 1 Dec 2009 13:50:57 -0500 > From: g...@ldeo.columbia.edu > To: us...@open-mpi.org > Subject: Re: [OMPI users] Elementary question on openMPI application location > when using PBS submission > > Hi Belaid MOA > > See this FAQ: > http://www.open-mpi.org/faq/?category=running#do-i-need-a-common-filesystem > http://www.open-mpi.org/faq/?category=building#where-to-install > http://www.open-mpi.org/faq/?category=tm#tm-obtain-host > > Your executable needs to be on a directory that is accessible > by all nodes in your node pool. > An easy way to achieve this is to put it in a directory that > is NFS mounted on all nodes, and launch your pbs script from there. > > A less convenient alternative, if no NFS directory is available, > is to copy the executable over to the nodes. > > I also find it easier to write a PBS script instead of putting > all the PBS directives in the command line. > In this case you can put the lines below in your PBS script, > to ensure all nodes will be on your work directory (cd $PBS_O_WORKDIR): > > ######## > > #PBS ... (PBS directives) > ... > cd $PBS_O_WORKDIR > mpiexec -n .... > > ######## > > IIRR, by default Torque/PBS puts you in your home directory on > the nodes, which may or may not be the location of your executable. > > I hope this helps, > Gus Correa > --------------------------------------------------------------------- > Gustavo Correa > Lamont-Doherty Earth Observatory - Columbia University > Palisades, NY, 10964-8000 - USA > --------------------------------------------------------------------- > > Belaid MOA wrote: > > Hello everyone, > > I am new to this list and I have a very elementary question: suppose we > > have three machines, HN (Head Node hosting the pbs server), WN1 (A > > worker node) and WN (another worker node). The PBS nodefile has WN1 and > > WN2 in it (DOES NOT HAVE HN). > > My openMPI program (hello) and PBS script(my_script.sh) reside on the > > HN. When I submit my PBS script using qsub -l nodes=2 my_script.sh, I > > get the following error: > > > > -------------------------------------------------------------------------- > > mpirun was unable to launch the specified application as it could not > > find an executable: > > > > Executable: hello > > Node: WN2 > > > > while attempting to start process rank 0. > > -------------------------------------------------------------------------- > > > > How come my hello program is not copied automatically to the worker > > nodes? This leads to my elementary question: > > where the application should be when using a PBS submission? > > > > Note that when I run mpirun from HN with machinefile containing WN1 and > > WN2, I get the right output. > > > > Any help on this is very appreciated. > > > > ~Belaid. > > > > > > ------------------------------------------------------------------------ > > Windows Live: Keep your friends up to date with what you do online. > > <http://go.microsoft.com/?linkid=9691810> > > > > > > ------------------------------------------------------------------------ > > > > _______________________________________________ > > users mailing list > > us...@open-mpi.org > > http://www.open-mpi.org/mailman/listinfo.cgi/users > > _______________________________________________ > users mailing list > us...@open-mpi.org > http://www.open-mpi.org/mailman/listinfo.cgi/users _________________________________________________________________ Windows Live: Make it easier for your friends to see what you’re up to on Facebook. http://go.microsoft.com/?linkid=9691816
