Hi I have a master process which spawns a number of workers of which i'd like to save the output in separate files.
Usually i use the '-output-filename' option in such a situation. However, if i do mpirun -np 1 -output-filename work_out master arg1 arg2 all the files work_out.1, work_out.2, ... are ok, but work_out.0 contains both outputs of the master process(process 0 in COMM_WORLD) and of the first worker (process 0 in the communicator of the spawned processes). I also tried the '-tag-output' option, but this involves several additional steps, because i have to separate the combined outputs mpirun -np 1 -tag-output master arg1 arg2 > total.out grep "\[1,0\]" total.out | sed 's/\[1,0\]<stdout>://' > master.out grep "\[2,0\]" outA | sed 's/\[2,0\]<stdout>://' > worker_0.out grep "\[2,1\]" outA | sed 's/\[2,1\]<stdout>://' > worker_1.out ... Of course, this could be wrapped in a script, but it is a bit cumbersome (and i am not sure if the job-ids are always "1" and "2") ... Is there some simpler way to separate the output of the two streams? If not, would it be possible to extend the -output-filename option i such a way that it would also combine job-id and rank withe the output file: work_out.1.0 for the master's output, and work_out.2.0 work_out.2.1 work_out.2.2 ... for the worker's output? Thank You Jody
