[rules-users] determinism with rulebase partitioning

[Anstis, Michael (M.)]

Hi Mark,

A few questions:-

(A) What does "parallel evaluation of a rulebase" mean? Is it designed
to optimise, for example, two threads processing a stateless and
stateful session?

(B) Are there only two partitions, both of which are invisible to the
user? Is there any value in allowing user-defined partitions?

(C) Does the partition used depend upon what type of session is used
(i.e. stateless always uses the partition without an agenda whereas
stateful always uses the partition with an agenda)?

(D) Can a rule sometimes be deterministic and sometimes not (i.e.
depends upon the type of session)?

Cheers,

Mike

-----Original Message-----
From: rules-users-bounces at lists.jboss.org
[mailto:rules-users-bounces at lists.jboss.org] On Behalf Of Mark Proctor
Sent: 01 August 2008 07:05
To: Rules Users List
Subject: [rules-users] determinism with rulebase partitioning

We have rulebase partitioning almost working, this allows parallel 
evaluation of a rulebase. For stateless lessions with no agenda this 
will allow for much faster executions, where you don't care about 
deterministic execution. However for deterministic execution its more 
complicated. The current plan is to have an agenda per parition, which 
means that we no longer have rulebase wide deterministic execution 
order, only with the partition itself. The user is unlikely to be aware 
of the created partitions, so won't be aware of the unditermistic 
behavour of their rulebase. Anyone have any input on mechanisms users 
can do to help the rulebase know what needs to be executed 
deterministically and what doesn't?

Mark
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