[slurm-users] OpenMPI & Slurm: mpiexec/mpirun vs. srun

[Christopher Samuel]

On 19/12/17 13:35, rhc at open-mpi.org wrote:

> I’d be very surprised to find run time scaling better with srun 
> unless you are using some layout option with one that you aren’t 
> using with another. mpiexec has all the srun layout options, and a 
> lot more - so I suspect you just aren’t using the equivalent mpiexec 
> option. Exploring those might even reveal a combination that runs 
> better:-)

Interesting, this was just comparing a naive mpirun/srun comparison with
no bells and whistles (to provide guidance to the few folks running MPI
jobs on the Linux clusters).

Thanks!
Chris
-- 
  Chris Samuel  :  http://www.csamuel.org/  :  Melbourne, VIC