Hi, I ran hello program which return the host name when I run it using mpirun -np 8 hello all the 8 answer returned from the same machine when I run it using mpirun -np 8 --host host1,host2,host3 hello I got answers from all the machines but it is not from all processors because I have 8 processors host1=4, host2=2, host3=2 the answer was 3 from host1, 3 from host2 and 2 from host3.
Regards, > From: re...@staff.uni-marburg.de > Date: Wed, 28 Mar 2012 16:42:21 +0200 > To: us...@open-mpi.org > Subject: Re: [OMPI users] Can not run a parallel job on all the nodes in the > cluster > > Hi, > > Am 28.03.2012 um 16:30 schrieb Hameed Alzahrani: > > > Hi, > > > > I mean the node that I run mpirun command from. I use condor as a scheduler > > but I need to benchmark the cluster either from condor or directly from > > open MPI. > > I can't say anything regarding the Condor integration of Open MPI, but > starting it directly by mpirun and supplying a valid number of ranks and > hostfile should start some processes on other machines as requested. Can you > run a plain mpihello first and output rank and hostname? Do you have ssh > access to all the machines in questions? You have a shared home directory > with the applications? > > -- Reuti > > > > when I ran mpirun from a machine and checking the memory status for the > > three machines that I have it appear that the memory usage increased just > > in the same machine. > > > > Regards, > > > > > From: re...@staff.uni-marburg.de > > > Date: Wed, 28 Mar 2012 15:12:17 +0200 > > > To: us...@open-mpi.org > > > Subject: Re: [OMPI users] Can not run a parallel job on all the nodes in > > > the cluster > > > > > > Hi, > > > > > > Am 27.03.2012 um 23:46 schrieb Hameed Alzahrani: > > > > > > > When I run any parallel job I get the answer just from the submitting > > > > node > > > > > > what do you mean by submitting node: you use a queuing system - which one? > > > > > > -- Reuti > > > > > > > > > > even when I tried to benchmark the cluster using LINPACK but it look > > > > like the job just working on the submitting node is there a way to make > > > > openMPI send the job equally to all the nodes depending on the number > > > > of processor in the current mode even if I specify that the job should > > > > use 8 processor it look like openMPI use the submitting node 4 > > > > processors instead of using the other processors. I tried also --host > > > > but it does not work correctly in benchmarking the cluster so does any > > > > one use openMPI in benchmarking a cluster or does any one knows how to > > > > make openMPI divids the parallel job equally to every processor on the > > > > cluster. > > > > > > > > Regards, > > > > _______________________________________________ > > > > 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 > > _______________________________________________ > > 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
