Hi, Thanks that works fine when I submit hello program but when I tried to benchmark the system it look like it does not do anything mpirun -np 8 --hostfile hosts xhpl
Regards, > From: re...@staff.uni-marburg.de > Date: Wed, 28 Mar 2012 17:40:07 +0200 > To: us...@open-mpi.org > Subject: Re: [OMPI users] Can not run a parallel job on all the nodes in the > cluster > > Am 28.03.2012 um 17:35 schrieb Hameed Alzahrani: > > > Hi, > > > > Is there a specific name or location for the hostfile because I could not > > figure how to specify the number of processors for each machine in the > > command line. > > No, just specify the name (or path) to it with: > > --hostfile foobar > > -- Reuti > > > > Regards, > > > > > From: re...@staff.uni-marburg.de > > > Date: Wed, 28 Mar 2012 17:21:39 +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 16:55 schrieb Hameed Alzahrani: > > > > > > > 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. > > > > > > If you want to specify the number of slots you can put it in a hostfile > > > (otherwise a round robin assignment is just used). I'm not aware that it > > > can be specified on the command line with different values for each > > > machine: > > > > > > host1 slots=4 > > > host2 slots=2 > > > host3 slots=2 > > > > > > -- Reuti > > > > > > > > > > > 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 > > > > _______________________________________________ > > > > 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
