how many nodes are in your cluster?

[Dan Sturtevant]

It seems that when many people design their cluster they tend to build 
them with a power of 2 number of compute nodes.  Is this just because we 
are all used to thinking in binary or are there codes (not benchmarks) 
that require or optimize for N=2^m nodes/procs?  If so, what are you 
running?

Thanks in advance for your thoughts.

Dan

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