>PBS loves to read the nodes' list backwards. > If you want to start with WN1, > put it last on the Torque/PBS "nodes" file. Nice to know. Thanks Gus for the tip!
Best Regards. ~Belaid. > > Gus Correa > --------------------------------------------------------------------- > Gustavo Correa > Lamont-Doherty Earth Observatory - Columbia University > Palisades, NY, 10964-8000 - USA > --------------------------------------------------------------------- > > > Belaid MOA wrote: > > I actually tried both: > > -- in the interactive mode, as soon as I hit enter, the PBS sends me to > > a worker node (WN2) that does not have tm support. > > I guess if I added the head node to the list of PBS nodes, I would > > not run into the problem. However, I am glad I did run into > > the problem. You guys helped me understand how mpirun interacts with > > PBS. > > -- in the batch mode, the PBS chooses WN2 as the root node (rank 0) to > > run mpirun. > > So, Both behaved in the same in my case. > > > > With many thanks Ralph for the clarification. I am now getting into the > > openMPI spirit. By the way, I love it :) > > > > ~Belaid. > > > > > > > > > > > > ------------------------------------------------------------------------ > > From: r...@open-mpi.org > > Date: Tue, 1 Dec 2009 19:44:38 -0700 > > To: us...@open-mpi.org > > Subject: Re: [OMPI users] mpirun is using one PBS node only > > > > Just to further show my confusion (since I wrote much of the TM support): > > > > If you get an interactive allocation and then type "mpirun ....", mpirun > > will execute on the node upon which you are sitting. Jeff's statement is > > -only- true if you "qsub" the job - i.e., you run it in batch mode. > > > > From your prior notes, I was under the impression you were running > > interactively. If this is true, then you only need OMPI to be built with > > TM support on the node which you are interactively working on. > > > > If you are running it in batch mode, then Jeff is correct - you will > > need OMPI built with TM support on all nodes since you (in general) > > cannot know which node PBS will launch you on. > > > > Hope that is clear > > Ralph > > > > On Dec 1, 2009, at 7:35 PM, Belaid MOA wrote: > > > > > Yes, this page is definitely incorrect if you want to run with > > PBS/TM > > > support -- you definitely need to install with TM support on all > > nodes. > > > > > > The reason is that PBS will launch your script (and therefore > > > "mpirun") on the first node of the job. This node must have an Open > > > MPI mpirun with TM support so that it can query PBS to get the nodes > > > to launch on, use the TM API to launch processes on the nodes > > > allocated to the job, etc. > > That's exactly the sound logic I understood from OpenMPI > > documentation but > > I thought the website is reliable in the sense it configured the > > server node with > > tm support. > > > > I am very grateful to subscribe to this list. It is one of the most > > active list I ever saw. > > > > Thanks a lot Jeff. > > > > With Best Regards. > > ~Belaid. > > > > ------------------------------------------------------------------------ > > Get a great deal on Windows 7 and see how it works the way you > > want. See the Windows 7 offers now. > > > > <http://go.microsoft.com/?linkid=9691813>_______________________________________________ > > users mailing list > > us...@open-mpi.org <mailto:us...@open-mpi.org> > > http://www.open-mpi.org/mailman/listinfo.cgi/users > > > > > > > > ------------------------------------------------------------------------ > > Get a great deal on Windows 7 and see how it works the way you want. See > > the Windows 7 offers now. <http://go.microsoft.com/?linkid=9691813> > > > > > > ------------------------------------------------------------------------ > > > > _______________________________________________ > > 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 _________________________________________________________________ Eligible CDN College & University students can upgrade to Windows 7 before Jan 3 for only $39.99. Upgrade now! http://go.microsoft.com/?linkid=9691819
