[rules-users] Drools Fusion Performance and RETE algorithm

Hi all Looking at "Drools JBoss Rules 5 0 Developer's guide" it addresses the Fusion component at page 134, stating: "This problem cannot be solved by the standard Drools rule engine. The volume of events is huge and it happens asynchronously. If we simply inserted them into the knowledge session, we would soon run out of memory. While the Rete algorithm behind Drools doesn't have any theoretical limitation on number of objects in the session, we could use the processing power more wisely. Drools Fusion is the right candidate for this kind of task." Ok, but my question is if this is enough, because I would guess that Fusion could be used to derived a more complex/rich event from the stream of events, and afterwards that complex event would be inserted in Working Memory (but not the flow of events that have generated the more complex event), thus reducing RETE algorithm processing. But since in our case every event will most certainly fire a rule, I am not sure about Fusion's usage. This is because our project is more a kind of Event-Trigger-Rule/Action system, meaning we have a high volume of incoming events (say more than 5000/minute), but each of the events will have to trigger a rule (and usually a rule is more or less a complex action, invoking DB operations and data structures manipulation). So, by using Fusion entry-points, would that be different than just sending the events as "normal" facts to Working Memory, or by dividing this in entry-points( or so called streams) we would have benefits in the RETE processing (I am assuming Fusion also uses RETE someway)? Best regards Orlando. PS-Does anyone know where can I find more info on the coupling of Drools Expert and Fusion?