Hi Umanga Yes, ssh (or rsh) should be configured on every machine, and it must be configured in such a way that no passwords are needed to make a connection. For example, for passwordless connection using ssh i place every node's public key into the file ~/.ssh/authorized_keys of every node.
And, yes, 1.2.7 is a rather old version - the current one is 1.3.2. It would be good if you could update your version to a newer one. Jody On Mon, Jun 29, 2009 at 7:00 AM, Ashika Umanga Umagiliya<auma...@biggjapan.com> wrote: > Hi Vipin , > Thanks alot for the reply. > I went through the FAQ and it also answered some of my questions. > > But my problem is, since I am using TCP/Ethernet I guess that MPI uses > SSH/RSH to communicate between peers. > And for that, each peer should have the copy of the application right? > > I use 1.2.7rc2 (from Debian/Lenny repo) , and I didn't see the option > "--preload-binary" , is it because the lower version? > > Bets regards, > umanga. > > > > vipin kumar wrote: > > Hi, > I am not expert, I am user like you but I think I can help you, > > Q. After installing OpenMPI on each machine ,do i need to run a > service/daemon on each machine? > Ans. No, not at all, Open MPI takes care of that for you. > > Q. How does peers in MPI environment communicate ? > Ans. Using Communicator(name of the group of processes to whom it belongs, > technically handle) and rank of the process in that Communicator. > > Q. After implementing parallel program , do I have to install the > application on every machine ? > Ans. Not necessary. Use "--preload-binary" option while launching the > application through mpirun or mpiexec. > > Useful links: > 1. http://www.open-mpi.org/faq/?category=running#simple-spmd-run > 2. http://www.open-mpi.org/faq/ > 3. man page for mpirun > > Regards, > Vipin K. > > On Mon, Jun 29, 2009 at 8:21 AM, Ashika Umanga Umagiliya > <auma...@biggjapan.com> wrote: >> >> Greeting all, >> >> I am new to Open MPI and I have some newbie questions. I have given 4 >> machines at our laboratory to set up Open MPI.Our net work is simply >> TCP/Ethernet running Debian Linux. >> >> 1) After installing OpenMPI on each machine ,do i need to run a >> service/daemon on each machine? (How does peers in MPI environment >> communicate ?) >> >> 2) After implementing parallel program , do I have to install the >> application on every machine ? (I thought the program automatically >> propagated to other peers , like in RMI applications? ) >> >> >> >> Thanks in advance, >> Umanga >> >> >> _______________________________________________ >> users mailing list >> us...@open-mpi.org >> http://www.open-mpi.org/mailman/listinfo.cgi/users > > > > -- > Vipin K. > Research Engineer, > C-Dot, Bangalore, India > > ________________________________ > _______________________________________________ > 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 >
