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@lists.jboss.org
[mailto:rules-users-bounces@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@mdes.ms.gov> wrote:
> From: Vijay K Pandey <VPandey@mdes.ms.gov>
> Subject: [rules-users] Drrols 5 Expert --> Sequential vs
Inference
> To: "rules-users@lists.jboss.org"
<rules-users@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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