[MPICH] mpirun vs. mpiexec

[Matthew Chambers]

> > I was contemplating switching over to the setup where each user starts
> > their own ring. I have an older cluster that I am planning on testing
> > this setup with. I am curious to know if there are
> > advantages/disadvantages over the two setups. Would I notice anything
> > different in terms of performance?
> 
> I don't think you will see any difference in MPI performance whether mpds
> are started by root or users...

If one is using a lot nodes, doesn't setting up the MPI ring incur quite a
bit of overhead with the ssh calls?

-Matt Chambers