On Jul 12, 2010, at 2:17 AM, jody wrote: > 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).
Crud - that's a bug. > > 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? Not really. > > 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? Yeah, I can do that - will put something together. Are you doing this in the 1.4 series? > > Thank You > Jody > _______________________________________________ > users mailing list > us...@open-mpi.org > http://www.open-mpi.org/mailman/listinfo.cgi/users
