Good, then please supply a hostfile with the names of the machines you want to run for a particular run and give it as option to `mpiexec`. See options -np and -machinefile.
-- Reuti Am 19.04.2011 um 06:38 schrieb mohd naseem: > sir > when i give mpiexec hostname command. > it only give one hostname. rest are not shown. > > > > > > > On Mon, Apr 18, 2011 at 7:46 PM, Reuti <re...@staff.uni-marburg.de> wrote: > Am 18.04.2011 um 15:40 schrieb chenjie gu: > > > I am a green hand on Openmpi, I have the following Openmpi structure, > > however it has problem when running across multiple nodes. > > I am trying to build a Bewolf Cluster between 6 nodes of our serve (HP > > Proliant G460 G7), I have installed the Openmpi on one node (assuming at > > /mirror), > > ./configure --prefix=/mirror/openmpi CC=icc CXX=icpc F77=ifort FC=ifort > > make all install > > > > using NFS, the directory of /mirror was successfully exported to the rest > > of 5 nodes. Now as I test the Openmpi, it runs very well on a single node, > > however it hangs across multiple nodes. > > > > Now one possible reason as I know is that Openmpi uses TCP to exchange data > > between different nodes, so I am worried about > > whether there are firewalls between each nodes, which can be factory > > integrated at somewhere(switch/NIC). Could anyone give me some > > information on this point? > > It's not only about MPI communcation. Before you need some means to allow the > startup of the local orte daemons on each machine by passphraseless ssh-keys > or better hostbased authentication > http://arc.liv.ac.uk/SGE/howto/hostbased-ssh.html , or enable `rsh` on the > machines and tell Open MPI to use it. Is: > > mpiexec hostname > > giving you a list of the involved machines? > > -- Reuti > > > > Thanks a lot, > > Regards, > > ArchyGU > > Nanyang Technological University > > _______________________________________________ > > 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
