Re: [OMPI users] MPMD hostfile: executables on same hosts
Vineet, probably *not* what you expect, but I guess you can try $ cat host-file host1 slots=3 host2 slots=3 host3 slots=3 $ mpirun -hostfile host-file -np 2 ./EXE1 : -np 1 ./EXE2 : -np 2 ./EXE1 : -np 1 ./EXE2 : -np 2 ./EXE1 : -np 1 ./EXE2 Cheers, Gilles On Mon, Dec 21, 2020 at 10:26 PM Vineet Soni via users wrote: > > Hello, > > I'm having touble using the MPMD hostfile in which I want to place 2 > executables on the same nodes. > > For example, I can do this using Intel MPI by: > $ mpirun -machine host-file -n 6 ./EXE1 : -n 3 ./EXE2 > $ cat host-file > host1:2 > host2:2 > host3:2 > host1:1 > host2:1 > host3:1 > > This would place 2 MPI processes of EXE1 and 1 MPI process of EXE2 on host1. > > However, I get an error if I define the same hostname twice in the hostfile > of OpenMPI: > $ mpirun -hostfile host-file -np 6 ./EXE1 : -np 3 ./EXE2 > $ cat host-file > host1 slots=2 max_slots=3 > host2 slots=2 max_slots=3 > host3 slots=2 max_slots=3 > host1 slots=1 max_slots=3 > host2 slots=1 max_slots=3 > host3 slots=1 max_slots=3 > > Is there a way to place both executables on the same hosts using a hostfile? > > Thanks in advance. > > Best, > Vineet
Re: [OMPI users] MPMD hostfile: executables on same hosts
You want to use the "sequential" mapper and then specify each proc's location, like this for your hostfile: host1 host1 host2 host2 host3 host3 host1 host2 host3 and then add "--mca rmaps seq" to your mpirun cmd line. Ralph On Dec 21, 2020, at 5:22 AM, Vineet Soni via users mailto:users@lists.open-mpi.org> > wrote: Hello, I'm having touble using the MPMD hostfile in which I want to place 2 executables on the same nodes. For example, I can do this using Intel MPI by: $ mpirun -machine host-file -n 6 ./EXE1 : -n 3 ./EXE2 $ cat host-file host1:2 host2:2 host3:2 host1:1 host2:1 host3:1 This would place 2 MPI processes of EXE1 and 1 MPI process of EXE2 on host1. However, I get an error if I define the same hostname twice in the hostfile of OpenMPI: $ mpirun -hostfile host-file -np 6 ./EXE1 : -np 3 ./EXE2 $ cat host-file host1 slots=2 max_slots=3 host2 slots=2 max_slots=3 host3 slots=2 max_slots=3 host1 slots=1 max_slots=3 host2 slots=1 max_slots=3 host3 slots=1 max_slots=3 Is there a way to place both executables on the same hosts using a hostfile? Thanks in advance. Best, Vineet
[OMPI users] MPMD hostfile: executables on same hosts
Hello, I'm having touble using the MPMD hostfile in which I want to place 2 executables on the same nodes. For example, I can do this using Intel MPI by: $ mpirun -machine host-file -n 6 ./EXE1 : -n 3 ./EXE2 $ cat host-file host1:2 host2:2 host3:2 host1:1 host2:1 host3:1 This would place 2 MPI processes of EXE1 and 1 MPI process of EXE2 on host1. However, I get an error if I define the same hostname twice in the hostfile of OpenMPI: $ mpirun -hostfile host-file -np 6 ./EXE1 : -np 3 ./EXE2 $ cat host-file host1 slots=2 max_slots=3 host2 slots=2 max_slots=3 host3 slots=2 max_slots=3 host1 slots=1 max_slots=3 host2 slots=1 max_slots=3 host3 slots=1 max_slots=3 Is there a way to place both executables on the same hosts using a hostfile? Thanks in advance. Best, Vineet
