Today i got a question from my manager (i work in a bank, there will be 
a web layer at the bank office and a central ejb layer) :

"Emerson, how many boxes in the ejblayer do we need to support 800 
offices and more than 4000 simultaneous clients (from the offices). 
Imagine that you have available any number of xeon dual 2mhz with 2giga 
RAM connected through a gigabit lan, how many boxes of this kind do we 
need?"

I confess that i exitated a little. This is a though question, indeed. I 
think that CMP and mainly clustering will not have the same gain when 
you have too many nodes in the cluster, given the communication needed 
among the nodes to keep the data replicated.

Does any one have any parameter for a capacity plan for a scenario like 
this? jboss group, any clue ??

What could be the limit beetwen number of nodes and replication overhead?

Thanks in advance for any answer : )


-- 
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| Emerson Cargnin          |
| Analista de Sistemas Sr. |
| Tel : (051) 3358-4959    |
| SICREDI Serviços         |
| Porto Alegre - Brasil    |
|xxxxxxxxxxxxxxxxxxxxxxxxxx|



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