[jboss-user] [JBoss Messaging] - Re: Help on JBoss Messaging

[clebert.suconic@jboss.com]

We had a pretty big thread on User's forums some time ago about how clustering works.

http://www.jboss.com/index.html?module=bb&op=viewtopic&t=133762

In summary, we aways send the message to the consumers on the box where you sent the message. Having it as a single queue on the cluster wouldn't scale (simple mathematics), as you would have a single queue on the whole cluster.  If you have multiple producers (one on each box), you would have the load distributed.

As Tim Fox pointed out on that thread, if you can't process in parallel, you can't scale up: http://en.wikipedia.org/wiki/Amdahl%27s_law.



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