[jboss-dev-forums] [Design of JBoss Portal] - Re: portal clustering problem when using optimistic locking

[prabhat.jha@jboss.com]

anonymous wrote : 
  | In none of the thread dumps is it doing anything, which itself is informative -- there's no intra-cluster messages being handled by any of these servers in any of these thread dumps. That in and of itself is interesting. Makes me question whether whatever is going on here has anything to do w/ clustering. 
  | 

The only reason I started on clustering configuration modification is because after 3-nodes, portal cluster was not able to handle more requests Upto 3 node, I do not see any problem with scalability but with 4 and 5 I do. 

Other potential bottleneck is database but given that 3-node cluster can handle around 4K users while with 5-node cluster, it starts crawling with 2.5K users, I am not suspecting database at this stage. I hope I am not overlooking something here.

Brian, what else do you suspect based on what you saw in thread dumps?

anonymous wrote : 
  | If you run these tests with a set of non-clustered portal servers, what kind of #s do you see?
  | 
I have not run tests with more than 2 server in a non-clustered environment. With 2-nodes, it could handle twice more load than that of 1-node which is also the case with 2-node cluster.

I would anyday prefer there is nothing wrong with jboss cache and hibernate integrations and it's something in Portal itself. ;-)

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