Follow these guidelines to launch jobs on the cluster:

1. Reserve nodes first using 'getresv'. 
   $ getresv 4
   reserves 2 nodes, for instance. You get 4 CPUs since each node has
   2 CPUs. Only an even number of processors is meaningful.

2. For MPI jobs, start lam with
   $ lamboot $PBS_NODEFILE
   and run your jobs with
   $ mpirun -np <num_processes> <program>
   
3. For *P, all you need to do is
   $ startmp

4. Please logout after using the nodes to return them to PBS - the
   reservation system. Idle reservations will be terminated in 30 mins.

5. Basically, use the head node to edit and compile your code. Then reserve
   a few nodes to debug, and logout to edit/recompile.