[Beowulf] cluster scheduler implemented via MPI?

[Andrew Piskorski]

A cluster scheduler (or resource manager) like SGE, SLURM, or Torque
can itself be viewed as a parallel application running on a cluster.
So I'm wondering, have any such schedulers been implemented *as* an
MPI program?  (Or PVM or whatever else?)  If not, why not?  Does the
MPI programming environment not provide a suitable substrate for what
a cluster scheduler needs to do?

-- 
Andrew Piskorski <atp at piskorski.com>
http://www.piskorski.com/