Am 14.10.2016 um 23:10 schrieb Mahdi, Sam: > Hello everyone, > > I am attempting to run a single program on 32 cores split across 4 computers > (So each computer has 8 cores). I am attempting to use mpich for this. I > currently am just testing on 2 computers, I have the program installed on > both, as well as mpich installed on both. I have created a register key and > can login in using ssh into the other computer without a password. I have > come across 2 problems. One, when I attempt to connect using the mpirun -np 3 > --host a (the IP of the computer I am attempting to connect to) hostname > I recieve the error > unable to connect from "localhost.localdomain" to "localhost.localdomain" > > This is indicating my computers "localhost.localdomain" is attempting to > connect to another "localhost.localdomain". How can I change this so that it > connects via my IP to the other computers IP? > > Secondly, I attempted to use a host file instead using the hydra process > wiki. I created a hosts file with just the IP of the computer I am attempting > to connect to. When I type in the command mpiexec -f hosts -n 4 ./applic > > I get this error > [mpiexec@localhost.localdomain] HYDU_parse_hostfile > (./utils/args/args.c:323): unable to open host file: hosts
As you mentioned MPICH and their Hydra startup, you better ask at their list: http://www.mpich.org/support/mailing-lists/ This list is for the Open MPI implementation. -- Reuti > > along with other errors of unable to parse hostfile, match handler etc. I > assume this is all due to it being unable to read the host file. Is there any > specific place I should save my hosts file? I have it saved directly on my > Desktop. I have attempted to indicate the full path where it is located, but > I still get the same error. > > For the first problem, I have read that I need to change /etc/hosts manually > by using the sudo command to manually enter the IP of the computer I am > attempting to connect to in the /etc/hosts file. Thank you in advance. > > Sincerely, > Sam > > > _______________________________________________ > users mailing list > users@lists.open-mpi.org > https://rfd.newmexicoconsortium.org/mailman/listinfo/users _______________________________________________ users mailing list users@lists.open-mpi.org https://rfd.newmexicoconsortium.org/mailman/listinfo/users
