how many nodes are in your cluster?

[Dan Sturtevant]

Replying to myself...

The obvious thing to do for price/preformance sake is to design with 2^m 
nodes to fully utilize switches with 2^m ports.  With one of these nodes 
as a head node (not a compute resource in the scheduler because user-
compilation/admin/file-serving on this node potentially eats its 
resources) this leaves 2^m - 1 compute nodes.

Therefore, which is the better general case?

Again,
Dan

On Sun, 7 Jul 2002, Dan Sturtevant wrote:

> 
> 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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