[MPICH] mpirun vs. mpiexec

[Anthony Chan]

On Tue, 5 Jun 2007, Steve Young wrote:

> I guess what still puzzles me is what is the difference between them
> (mpiexec and mpirun)? Why couldn't mpirun be written so it could be
> given an argument of -machinefile? Or rather why are there two programs
> anyhow?

http://www.mpi-forum.org/docs/mpi-20-html/node42.htm

mpiexec is a replacement of mpirun (which is provided in mpich2 for
backward compatibility reason)

A.Chan