[Beowulf] Help with MPICH programming

[Cheng, Kevin]

I've been looking and looking on the internet for documentation on programming in MPI but couldn't find any.
 
What am needing to know is how to change the communication group for MPICH-1.2.1. Basically so that when the master process 0 broadcasts a message it will only be heard by the processes in a specific communication group.
 
Many thanks
Kev
 
PS: Did anyone find out how to dynamically create/destroy MPI processes on-the-fly / in-real-time for MPICH-2?
 
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