>From the rank #0 process, I wish to start another mpi job (to create some
data to be used by the parent job).
I'm trying to do this with the command
istat= system( "/...path.../mpirun -np 2 /...path.../prog2 args
>file.log 2>&1" )
within the code executed by the rank #0 process, where ...path
You cannot cascade mpirun cmds like that - the child mpirun picks up envars
that causes it to break. You'd have to either use comm_spawn to start the child
job, or do a fork/exec where you can set the environment to be some pristine
set of values.
> On Jul 11, 2020, at 1:12 PM, John Retterer v
Thank you, Ralph. I was afraid that was the reason it didn’t work but I
wanted to be sure.
John
On Sat, Jul 11, 2020 at 5:37 PM Ralph Castain via users <
users@lists.open-mpi.org> wrote:
> You cannot cascade mpirun cmds like that - the child mpirun picks up
> envars that causes it to break.
