Re: Cluster computing drawbacks

Nick Maclaren wrote:

(snip)

Unless the application is a complete crock, it needs NO rewriting
to run under a MPI spawning program (which are widespread), a batch
scheduler or both.  Just Do It.  Converting to use MPI communication
is harder, but still easier than converting to use SMP communication.


Most people's experience is that it is EASIER than converting
a serial program to use SMP communication.  Seriously.  Converting
to use SMP is one of the foulest tasks that you can imagine, and is
enought to make you wake up in the middle of the night screaming and
dripping with sweat.


I thought people just ran MPI code on the SMP machines...

Ones that I would be interested in working on are PDE solvers,
and the communications might be a little faster on SMP, at least with not so many processors.

-- glen

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