Yuri,
Right now, the only way is to work with different rule bases and working memories. Even using agenda-groups or rule-flow, rules are still being eagerly evaluated, as this is how standard Rete works.
The problem of creating and canceling too many activations is a known problem and the only way around it right now is sequential mode, but sequential mode has some restrictions on what you can do. For instance, you must work with a stateless working memory and can not modify/retract facts in your rules to work with sequential mode, but it will give you big performance boosts.
We are evaluating the possibility of creating physical network partitions for next version, but that will require some R&D yet.
[]s
Edson
2007/8/14, Yuri <
ydewit@gmail.com>:Dr. Gernot Starke <gs <at>
gernotstarke.de> writes:
> can you detail your problem a little?
I basically need to find perfect matches between two different sets of objects.
If perfect matches are not found, I then create bulks of objects that are then
used in combination with the individual ones to find bulk matches. If no matches
are found I need then to categorize the breaks (around 10 different
categorizations) and report them.
The matching criteria between two object is specific enough to be fast. Once I
get into break, which basically is removing some criteria components, the
possible combinations increase exponentially. Bulking just compounds the problem
by adding more matchable/breakable facts into memory.
My bulking logic (I didnt have collect when I started with 3.0) starts a bulk
looking for two diff objects with the same bulkling criteria (this is my first
potential cross product since drools would produce C!/N!(C-N)! combinations).
Then once the bulk for a given criteria is create I have a second rule that
expands or contracts the bulks as new facts are asserted causing many different
side effects.
What I am basically seeing is that asserting a fact that would for instance be a
perfect match, causes many of the bulking and breaking rule activations to be
created and then cancelled. Considering that I am talking about tens or hundreds
of thousands of facts I thought that if I could stage the activation creations I
would increase processing speed.
With 15K objects on each side I have been seeing something like 1 assertion per
second.
I am aware that this could be cross product somewhere but I have already revised
the rules many many times so now I am looking for other alternatives.
I am now trying to understand looking I basically need to find perfect matches
between two different sets of objects. If perfect matches are not found, I then
create bulks of objects that are then used in combination with the individual
one to find bulk matches. If no matches are found I need then to categorize the
breaks (around 10 different categorizations) and report them.
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Edson Tirelli
Software Engineer - JBoss Rules Core Developer
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