Sorry If I misunderstood but, Should the mpirun -np4 hostname command return all the machines no the openmpi-default-hostfile?
My host file has just two ips, the first is the server and the second a node. 192.168.0.1 192.168.0.3 It just return the name of my server 4 times. The same happens with other commands like "ls" or just "dir". I didn't understood yet why does the mpi run the process 4 times or x times. It must be just one but spreading it on the other machines. Must not it?? On Tue, Jan 5, 2010 at 6:14 PM, Jeff Squyres <jsquy...@cisco.com> wrote: > You might want to try something simpler than java to start with. For > example: > > mpirun -np 4 hostname > > (where hostname is the POSIX command line app, not an MPI app) > > You should see the hostnames from the first 4 hosts in your hostfile > (assuming each one of them has 1 process slot). Then try running the > samples that are in the examples/ directory in the Open MPI tarball (make > sure that the example executables are available in the same location on > every node). For example: > > cd examples > make > mpirun -np 4 hello_c > > That's a trivial C MPI application that is the MPI equivalent of "hello > world". > > > On Jan 5, 2010, at 11:18 AM, Leonardo Machado Moreira wrote: > > > Hi, I have created a cluster with openmpi this way. > > > > 1 - Configured SSH with authorized_keys from the server to the nodes. > > 2 - In /etc/openmpi-default-hostfile\ I have typed the IP of every nodes > and the server. > > 3 - Afterward I have created a Java application of two threads just to > type a text on the console and runned it by > > mpirun -1 java javaprogram > > or > > mpirun -2 java javaprogram > > It is on the ps -aux of the server but the nodes are still stoped. > > > > How can I know that my mpi is working > > > > Thanks a lot > > _______________________________________________ > > users mailing list > > us...@open-mpi.org > > http://www.open-mpi.org/mailman/listinfo.cgi/users > > > -- > Jeff Squyres > jsquy...@cisco.com > > > _______________________________________________ > users mailing list > us...@open-mpi.org > http://www.open-mpi.org/mailman/listinfo.cgi/users >
