Hello, I have a few questions on Drools. * My client has millions of rows of Facts of same type , to which the rules are applied. The facts are never updated. * There is multiple set of Rule groups (Cancer type can be Breast/Colon/Thyroid etc), with each group containing multiple rules in a separate .drl file (BeastCancer.drl, ColonCancer.drl etc). I have the following requirements/questions 1) Each group has a first rule that checks for Cancer type - If the caner type is not the one for this group (Say the CaseFact is for Colon but the current rule group is for Breast) the rule flow should stop for this group and continue for other groups. I guess I can achieve this by having my first rule with a high Salience and skip the rest of the rules if the condition is met. (drools.clearAgenda () may be ?) 2) within a group of rules - I need to skip the execution for rest of rules in this group only depending on the condition. 3) Some conditional flow (I believe I can achieve this with Rule Flow Group). 4) Should I have have one KnowledgeBase/Stateless session per .drl file (one per beast.drl one for colon.drl)? That seems to be the logical thing to! 5) Main question is how do I skip execution of a set of rules I appreciate in advance! Thanks Matt'M -- View this message in context: http://drools.46999.n3.nabble.com/Drools-Processing-large-volume-of-Same-... Sent from the Drools: User forum mailing list archive at Nabble.com.