Take a look at "man orte_hosts" for a full explanation of how to use hostfile - /etc/hosts is not a properly formatted hostfile.
You really just want a file that lists the names of the hosts, one per line, as that is the simplest hostfile. > On Sep 7, 2019, at 4:23 AM, Sepinoud Azimi via users > <users@lists.open-mpi.org> wrote: > > Hi, > > I have a parallelized code that works fine on my local computer with the > command > > $mpirun -n 5 python parallel_simulation.py > but when I try the same code on cluster I only get one process and it is not > running in parallel. I have both mpich and openmpi loaded on my cluster. > > I tried to use > > $mpirun -n 5 -hostfile /etc/hosts python parallel_simulation.py > which gives me error > > Open RTE detected a parse error in the hostfile: > > > /etc/ > hosts > > It occured on line number 39 on token 12. > -------------------------------------------------------------------------- > -------------------------------------------------------------------------- > An internal error has occurred in ORTE: > > > > [[57450,0],0] FORCE-TERMINATE AT (null):1 - error > base/ras_base_allocate.c(302) > > > > This is something that should be reported to the developers. > This is what I get when I run: > > $cat /etc/hosts > > > # Ansible managed file, do not edit directly > > 127.0.0.1 localhost localhost.localdomain localhost4 localhost4. > localdomain4 > > ::1 localhost localhost.localdomain localhost6 localhost6. > localdomain6 > > > # Hosts from ansible hosts file > 10.1.1.2 titan-install.int.utu.fi titan-install > 10.1.1.1 titan-admin.int.utu.fi titan-admin > 10.1.1.3 titan-grid.int.utu.fi titan-grid > 10.1.100.1 ti1.int.utu.fi ti1 > 10.2.100.1 ti1-ib.int.utu.fi ti1-ib > 10.1.100.2 ti2.int.utu.fi ti2 > > > I would be very grateful if someone could suggest a solution. I am very new > to this and I am not sure how to solve the problem. > _______________________________________________ > users mailing list > users@lists.open-mpi.org > https://lists.open-mpi.org/mailman/listinfo/users _______________________________________________ users mailing list users@lists.open-mpi.org https://lists.open-mpi.org/mailman/listinfo/users
