Hello, I have millions of the same type of Facts which are read from the Datebase. The rules will go through each fact and produce an Array of derived records from the FACT. Do I need to process one FACT at a time or can I pass in say 500 FACTS at a time? I am using Stateless Session for this purpose. Can some one suggest me some ideas please? I appreciate in advance! Thanks Matt'M -- View this message in context: http://drools.46999.n3.nabble.com/Batch-processing-large-volume-of-Same-t... Sent from the Drools: User forum mailing list archive at Nabble.com. _______________________________________________ rules-users mailing list rules-users(a)lists.jboss.org https://lists.jboss.org/mailman/listinfo/rules-users

Hi Stephen, Thank you very much for your reply! I have another requirement. Each FACT produces set of records (ArrayList of results). Due to some constraint I need to keep each array set in the memory as a working fact because I need to have another rule that will evaluate the array list (for Each original FACT) and stop processing that particular after certain set of constraint (combination of records) have reached. In this situation due to "cartesian' products (n*n) it does becomes expensive! I am thinking may be I process one FACT at a time as each FACT produces an ARRAY List which is a FACT it self. Any ideas please? Thanks Matt -- View this message in context: http://drools.46999.n3.nabble.com/Batch-processing-large-volume-of-Same-t... Sent from the Drools: User forum mailing list archive at Nabble.com. _______________________________________________ rules-users mailing list rules-users(a)lists.jboss.org https://lists.jboss.org/mailman/listinfo/rules-users