Re: [OMPI users] Distribute app over open mpi
On Fri, 2009-11-06 at 08:10 -0800, Arnaud Westenberg wrote: > Hi all, > > Sorry for the newbie question, but I'm having a hard time finding the answer, > as I'm not even familiar with the terminology... > > I've setup a small cluster on Ubuntu (hardy) and everything is working great, > including slurm etc. If I run the well known 'Pi' program I get the proper > results returned from all the nodes. > > However, I'm looking for a way such that I wouldn't need to install the > application on each node, nor on the shared nfs. Currently I get the obvious > error that the app is not found on the nodes on which it isn't installed. > > The idea is that the master node would thus distribute the required (parts of > the) program to the slave nodes so they can perform the assigned work. > > Reason is that I want to run an FEA package on a much larger (redhat) cluster > we currently use for CDF calculations. I really don't want to mess up the > cluster as we bought it already configured and compiling new versions of the > FEA package on it turns out to be a missing library nightmare. I don't understand the question. Do you have a binary that works on your new cluster or not? I just don't see how recompiling the code fits with the rest of the question. If you have an OpenMPI-linked binary for your FEA, simply copy it out to your nodes, then run it. There are many ways to do this: which is best depends on many factors. Probably scp is your friend if you don't have a common filesystem.
Re: [OMPI users] Help: Firewall problems
On Fri, Nov 6, 2009 at 7:15 PM, Jeff Squyres wrote: > On Nov 6, 2009, at 5:49 AM, Lee Amy wrote: > >> Thanks. And actually I don't know if I need to disable iptables to run >> MPI programs properly. Obviously from your words Open MPI will use >> random ports so how do I set up in iptables then let trusted machines >> open their random ports? >> > > > I'm afraid I'm not enough of an iptables expert to know (I don't know if > anyone else on this list will be, either) -- you'll need to check the > iptables docs to see. > > Sorry! > > -- > Jeff Squyres > jsquy...@cisco.com > > ___ > users mailing list > us...@open-mpi.org > http://www.open-mpi.org/mailman/listinfo.cgi/users > That's okay. Thank you all the same. You provide me lots of information about that. Thanks. Amy
Re: [OMPI users] an environment variable with same meaning than the-x option of mpiexec
FWIW, environment variables prefixed with "OMPI_" will automatically be distributed out to processes. From mpirun(1): Exported Environment Variables All environment variables that are named in the form OMPI_* will auto- matically be exported to new processes on the local and remote nodes. The -x option to mpirun can be used to export specific environment variables to the new processes. While the syntax of the - x option allows the definition of new variables, note that the parser for this option is currently not very sophisticated - it does not even under- stand quoted values. Users are advised to set variables in the envi- ronment and use -x to export them; not to define them. Depending on your environment and launcher, your entire environment may be copied out to all the processes, anyway (rsh does not, but environments like SLURM do), making the OMPI_* and -x mechanisms somewhat redundant. Does this help? On Nov 6, 2009, at 9:59 PM, Ralph Castain wrote: Not at the moment - though I imagine we could create one. It is a tad tricky in that we allow multiple -x options on the cmd line, but we obviously can't do that with an envar. The most likely solution would be to specify multiple "-x" equivalents by separating them with a comma in the envar. It would take some parsing to make it all work, but not impossible. I can add it to the "to-do" list for a rainy day :-) On Nov 6, 2009, at 7:59 AM, Paul Kapinos wrote: > Dear OpenMPI developer, > > with the -x option of mpiexec there is a way to distribute > environmnet variables: > > -x Export the specified environment variables to the > remote > nodes before executing the program. > > > Is there an environment variable ( OMPI_) with the same meaning? > The writing of environmnet variables on the command line is ugly and > tedious... > > I've searched for this info on OpenMPI web pages for about an hour > and didn't find the ansver :-/ > > > Thanking you in anticipation, > > Paul > > > > > -- > Dipl.-Inform. Paul Kapinos - High Performance Computing, > RWTH Aachen University, Center for Computing and Communication > Seffenter Weg 23, D 52074 Aachen (Germany) > Tel: +49 241/80-24915 > ___ > 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 -- Jeff Squyres jsquy...@cisco.com
