[Beowulf] emulating MPI?

[John Hearns]

On Mon, 2004-06-28 at 21:06, John Hearns wrote:
> On Mon, 2004-06-28 at 19:22, Robert G. Brown wrote:

> > 
> Indeed it does. Just use a machines file something like:
> localhost:n
> 
> I agree - that should get you up and running for tests on a single box.
> The documentation for mpich says that 'n' is the number of processors.
> But you can increase that number.

I should make it clear that the invocation is  mpirun -np m
where m is the number of processes.

I had it fixed in my head that localhost:n was a limit on the
number of processes. 
A quick test run confirms that you're able to start -np m 
where m is more than n.