“ibface” isn’t an OpenMPI cmd line option, so I suspect you are using something other than OpenMPI. For OMPI, you could specify the interface via MCA param in the environment or default MCA parameter file. Most MPI implementations have a similar mechanism - you might check your documentation.
> On Oct 24, 2017, at 6:48 PM, Doug Meyer <dameye...@gmail.com> wrote: > > Hi, > > I believe that if you are using OpenMPI you can declare the interface. By > default it should select the fastest interface on the system. This FAQ may > be of help. https://www.open-mpi.org/faq/?category=tcp > <https://www.open-mpi.org/faq/?category=tcp> > > If I have misunderstood the problem I apologize. best of luck! > > Doug > > On Tue, Oct 24, 2017 at 1:00 PM, Sebastian Eastham <seast...@mit.edu > <mailto:seast...@mit.edu>> wrote: > Dear Slurm Developers mailing list, > > > When calling the “srun” command, is there any way to specify the desired > network interface? Our network is a mix of ethernet and inifiniband, such > that only a subset of the nodes have an infiniband interface. When using > “mpirun” we can specify “-iface ib0”, but there does not appear to be a > similar option for “srun”. Although we can successfully run our applications > with “srun”, we can see from “iftop” that the application is communicating > purely through the ethernet interface. > > > > Once again, I appreciate any help or guidance that you can give me! > > > Regards, > > > > Seb > > > =-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-= > > Dr. Sebastian D. Eastham > > Research Scientist > > Laboratory for Aviation and the Environment > > Massachusetts Institute of Technology > > =-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-= > > > > > >
