On Oct 29, 2019, at 7:30 PM, Kulshrestha, Vipul via users
<users@lists.open-mpi.org<mailto:users@lists.open-mpi.org>> wrote:
Hi,
We recently shifted from openMPI 2.0.1 to 4.0.1 and are seeing an important
behavior change with respect to above option.
We invoke mpirun as
% mpirun –output-filename <log directory>/app.log –np <n> <application command
line>
With 2.0.1, the above produced <log directory>/app.log.<i> file for stdout of
the application, where <i> is the rank of the process. However, with 4.0.1, the
above produces <log directory>/app.log/1/rank.<i>/stdout
Is this intentional change? The documentation does not seem to indicate any
expected changes in the behavior. How do I get 4.0.1 to get log files as seen
in 2.0.1?
This was reported recently here:
https://github.com/open-mpi/ompi/issues/7095
It looks like we changed this behavior quite some time ago, and neglected to
update the documentation. :-\
Further, earlier, mpirun had no output on stdout, except to indicate, when all
the child process had completed. However, now the mpirun also spews out all the
application stdout messages (from each rank process) on its stdout. How do I
stop that?
Oh, did the prior behavior *only* output to the file and not to stdout/stderr?
Huh.
I guess a workaround for that would be:
mpirun ... > /dev/null
--
Jeff Squyres
jsquy...@cisco.com<mailto:jsquy...@cisco.com>
