Re: [OMPI users] Fwd: OpenMPI does not obey hostfile

Thank you Gilles for the pointer. However that package "openmpi-gnu-ohpc-1.10.6-23.1.x86_64.rpm" has other dependencies from the OpenHPC. Basically it is strongly tied to the whole OpenHPC concept. I did however follow your suggestion and rebuild the OpenMPI RPM package from redhat adding the

Re: [OMPI users] Fwd: OpenMPI does not obey hostfile

Anthony, a few things ... - Open MPI v1.10 is no more supported - you should at least use v2.0, preferably v2.1 or even the newly released 3.0 - if you need to run under torque/pbs, then Open MPI should be built with tm support - openhpc.org provides Open MPI 1.10.7 with tm support Cheers,

Re: [OMPI users] Fwd: OpenMPI does not obey hostfile

This is not explained in the manual, when giving a hostfile (though I was suspecting that was the case). However running one process on each node listed WAS the default behaviour in the past. In fact that is the default behaviour on a old Version 1.5.4 OpenMPI, I have on an old cluster which I

Re: [OMPI users] Fwd: OpenMPI does not obey hostfile

That is correct. If you don’t specify a slot count, we auto-discover the number of cores on each node and set #slots to that number. If an RM is involved, then we use what they give us Sent from my iPad > On Sep 26, 2017, at 8:11 PM, Anthony Thyssen > wrote: > >

[OMPI users] Fwd: OpenMPI does not obey hostfile

I have been having problems with OpenMPI on a new cluster of machines, using stock RHEL7 packages. ASIDE: This will be used with Torque-PBS (from EPEL archives), though OpenMPI (currently) does not have the "tm" resource manager configured to use PBS, as you will be able to see in the debug