    Tobias,

    I believe that this is more than a flow question. The answer depends on another question: what is taking too much time to execute? The evaluation of the rules in A and B (LHS) or the actual consequence execution of rules in A and B (RHS)?

    If it is LHS of the rules that is taking too long to execute, then you may try enabling the engine multi-thread evaluation option. If it is the consequence, unfortunately, the engine by itself can not solve the problem, because it does not know when/how the consequence code of your rules affect each other. This way, the engine executes all consequences in sequence, one after the other.

    If it is the later, one possible solution is to make your consequences trigger an asynchronous action instead of executing all the code in the same engine thread, when you know your code is independent among rules. We are working on enabling multiple agendas and different ways to execute consequences in the engine, but no idea at this moment when it will be ready.

    Edson

2009/8/13 Tobias Buchloh <t.buchloh@gmx.net>

Hi *,

I need to speed up the total processing time needed for the execution of
a rule flow which consists of multiple rule flow groups (e. g. A, B and
C). I'm thinking about to parallelize the execution of A and B.

+--> A --> +
Start --> split + +--> join --> C --> End
+--> B --> +

Is it possible to split a flow in multiple parallel execution paths
(with AND), execute them with real parallelism in their own threads and
join them together at the end?

Or is everything in the drools flow some sort of "pseudo-parallelism" so
that I would have to implement this by hand?

Cheers,
Tobias

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Edson Tirelli
JBoss Drools Core Development
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