Distributed Algorithm.

[Eric Osterweil]

Yeah,

This is a case where you're going to have to look at your problem as more of 
a parallel program than a distributed program.  You're processing sounds 
like it is very tightly coupled (or course grained) in nature.  You might 
consider following a parallel programming methodology and re-examine you 
partitioning scheme.  There are a lot of clever ways to parallelize 
seemingly atomic processing.  There is a book called "Parallel Computer 
Architecture : A Hardware/Software Approach" by  David E. Culler, Jaswinder 
Pal Singh, Anoop Gupta that has a VERY good section on how to parallelize 
very centralized algorithms.  In addition they have some very informative 
case studies in there that can give examples of this.  I highly recommend 
it.

Eric Osterweil


>From: Mofeed Shahin <shahin at labf.org>
>Reply-To: shahin at labf.org
>To: beowulf at beowulf.org
>Subject: Distributed Algorithm.
>Date: Thu, 14 Dec 2000 19:31:26 +0000
>
>G'day all,
>
>I am currently working on a program which is simulating the movements of 
>'n'
>number of nodes.
>
>The problem I am having is that it doesn't take long to calculate the next
>position of Node n1, n2, n3, etc...... I need all the locations for time t,
>before I can start calculation the locations for t+1.
>
>And therefore the bottleneck becomes the IO bandwidth between the cluster
>processing units, and not CPU.
>
>Is there a way to get rid of the bottleneck? (ie change of algorithm?)
>
>Mof.
>
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