Hi all! This is my first post. I'm newbie on Open MPI (and on MPI likewise!). I recently build the current version of this fabulous software (v4.0.1) on two Ubuntu 18 machines (a little part of our Beowulf Cluster). I already read (a lot) the FAQ and posts on the mail users list but I cant figure out how can I do this (if it can): I need run my parallel programs without mpirun/exec commands; I need just one process (in my “master” machine) that will spawns processes dynamically (in the “slaves” machines). I already maked some dummies tests scripts and they works fine with mpirun/exec commands. I set in the MPI_Info_set the key “add-hostfile” with the file containing that 2 machines, that I mention before, with 4 slots each one. Nevertheless it doesn't work when I just run like a singleton program (e.g. ./spawnExample): it throws an error like this: “There are not enough slots available in the system to satisfy the 7 slots that were requested by the application:...”. Here I try to start 8 processes on the 2 machines. It seems that one process its executing fine on “master” and when it tries to spawns the other 7 it crashes. We need this execution schema because we already have our software (used for scientific research) and we need to “incorporate” or “embed” Open MPI on it. Thanks in advance guys!
_______________________________________________ users mailing list users@lists.open-mpi.org https://lists.open-mpi.org/mailman/listinfo/users
