[Beowulf] MPI questions

Sean Dilda agrajag at dragaera.net
Wed Apr 6 10:15:24 EDT 2005


Reuti wrote:
> Jake Thebault-Spieker wrote:
> 
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>>  
>> I guess my question is how do I use MPI? Will the MPICH implementation
> 
> 
> http://www.netlib.org/utk/papers/mpi-book/mpi-book.html
> ftp://math.usfca.edu/pub/MPI/mpi.guide.ps
> 
>> work with a program written for MPI? Does one need MPICH on all of the
> 
> 
> Yes.
> 
>> nodes, or just the master node?
> 
> 
> For MPICH: only on the head node of your job it's necessary. 

That's assuming that your program is statically linked against the mpich 
libraries.  If they're dynamically linked, you'll of course need those 
libraries on all the nodes.
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