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
