[rules-users] Drrols 5 Expert --> Sequential vs Inference

[Vijay K Pandey]

Here is more information on this.



a)    Our business transactions (OLTP + batches (sequential)) can result in the range of 500K to 750k of transactions in a day. All these are short running transactions and max # of business rules that can get executed in it can be in the range of 50-75

b)    Each transaction can roughly interact with around 10 to 15 RDBMS tables with CRUD operations

c)    Read can result of no more than 100 records and CUD of no more than 25 records max in a single transaction

d)    We do cache lookup/master data - but we don't cache the transactional data (few tables have around 10 million records) --- within a business process there is always a likelihood of checking least 5 to 10 associated transaction data for the inserted fact. Our transactional data is always changing.

e)    Not all the rules are evaluated for each input - we can have a max of around 20 to 25 business rules max for a given input.

f)    We do have the lookup/master data perfected - which form a good amount of LHS condition but along with that mostly all our business process have rules that have to do some checks against associated transactional data which can't be perfected.

Thanks

Vijay

-----Original Message-----
From: rules-users-bounces at lists.jboss.org [mailto:rules-users-bounces at lists.jboss.org] On Behalf Of Greg Barton
Sent: Saturday, August 15, 2009 12:53 AM
To: Rules Users List
Subject: Re: [rules-users] Drrols 5 Expert --> Sequential vs Inference



Answering this question in any meaningful way without more information is difficult.  My first instinct is to wonder if the database calls really need to be done directly from the LHS of the rules, especially with this many of them.  I hope you're able to cache the database queries.



Anyway, in general, if you have that many rules it is usually best to keep them in a fashion that's easily manageable, and that's what RBMSs are for.  Apart from that it's hard to address your question without more information.  Are all of the 3500*0.9 rules evaluated for each input?  Can the data from the database be prefetched into working memory instead of fetched in each LHS?  How often does this fetched data change? There are many paths you could follow mattering on the answers to these questions and others.



--- On Fri, 8/14/09, Vijay K Pandey <VPandey at mdes.ms.gov> wrote:



> From: Vijay K Pandey <VPandey at mdes.ms.gov>

> Subject: [rules-users] Drrols 5 Expert --> Sequential vs Inference

> To: "rules-users at lists.jboss.org" <rules-users at lists.jboss.org>

> Date: Friday, August 14, 2009, 10:52 PM

>

> Hi,

>

> We have around 3500

> business rules and

> rules are mainly look up value based or based on the

> associated data in the

> RDBMS.

>

> There are around 90%

> processes where we

> only need sequential rules check, the other 10% of

> processes requires the

> inference capability.

>

> My

> questions:

>

> a)

> Which is the best

> way to go for this

> - should we set up all the rules as inference through

> stateful session or

> segregate 90% as sequential and others as inference. Will

> this segregation

> going to give better performance in Drools 5 and

> later?

>

> b)

> Lots of our LHS

> depends on the data from

> RDBMS - we insert 1 fact - then make use of

> "from/collect" to get hold of various

> associated data ---then do

> some checks on the data fetched from RDBMS -- so is it

> better to program them

> in java directly or as sequential rules?

>

> Any guidance will be

> helpful?

>

> Thanks

>

>

> Vijay

>









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