[BProc] run processes on master and modify machines file

[Andrew P. <ap...@ro...>]

I've setup bproc on my development cluster (1 master, 1 slave).
Commands execute successfully on the slave using bpsh.

The clustermatic 5 version of mpich seems to be installed and working,
however, i don't seem to be able to alter the machines file that  
mpich uses
to allocate processes to nodes.

I've tried editing:
/usr/mpich-p4/share/machines.LINUX
and
/util/machines/machines.LINUX
to contain the ip addresses of my two nodes:
10.0.1.100
10.0.1.101

 > mpirun -np 2 mpiTest
Not enough nodes to allocate all processes

alternately
 > mpirun -np 1 mpiTest
Test successful on process number: 0
elapsed_time =
         8.3e-05

Can anyone tell me how to edit the machines file, where it is  
located, and how to run on the master node.  Can mpich do round robin  
process allocation within this machines file?

- Andrew