[rules-users] Can Drools supply large Knowledge Base?

rouvas at mm.di.uoa.gr rouvas at mm.di.uoa.gr
Mon Dec 12 04:33:10 EST 2011


WangRamon wrote:
>
> Hi Guys I'm still confused about this question, let's say i may have a
> very large rule set, how can Drools support this case, will it load every
> rule into memory? Any idea? Thank you guys. CheersRamon

You are either asking the wrong question or you do not understand what you
are asking.

In your previous post, you mentioned a Knowledge Base of 100GB.
In this post you are talking about a rule set.
These are different things.
A Knowledge Base contains rules *and* facts and can indeed be quite large.
A rule set contains only rules. For a rule set to grow this much, it means
you have seriously misunderstand your problem. I would suggest you go back
to the drawing board.

Real-world example:
Rule set of about 400 rules.
Facts : In the order to 100.000.
Command line execution shows an approximate 400MB RAM consumption, meaning
with the JDK and all (not only Drools memory consumption).

So, unless you want to hear from someone more experienced than me, I'd
suggest you re-phrase your question by stating the exact problem you are
facing or anticipating.

Cheers,
-Stathis



>  From: ramon_wang at hotmail.com
> To: rules-users at lists.jboss.org
> Date: Thu, 8 Dec 2011 11:59:21 +0800
> Subject: [rules-users] Can Drools supply large Knowledge Base?
>
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> Hi All
>
> I'm new to Drools, I will build a very large Knowledge Base, let's say it
> will be larger than 100GB, the files will be stored in a distribute
> database, so can Droools supply this large Knowledge Base? Any solution?
> Thank you very much.
>
> Cheers
> Ramon
>
>
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