Hello Harshit / Mark, My reasoning behind the yes, is that:
- If you have 10 rules that won't necessarily always match, it's better to use Rete, than sequentially match one-by-one. The tree structure with the sharing of nodes for different rules seems to always be a better approach for me, than sequentially testing one-by-one and, in some cases, retesting the same condition on different rules (if that happens); - You can write if-then-elses in a imperative language and perform better than Rete, but if your rules are complicated and you have many of them, it's likely that rete can do a better job; Also, if you need to change your rules or add new ones, it will be easier to do that declaratively; I first put the links, because you can use that to judge yourself whether or not you might gain in performance in your own scenarios, with that material. @Mark: In general a stateless session is just a convenience api for stateful, it > just wraps. So no performance gain at all. I think here you're saying that there will be no performance gain compared to a stateful session, but I believe that the question was more on the lines of "I know that with a stateful it's efficient, how about stateless". I tried to say that, yes, it's also worth using Rete in stateless scenarios. Cheers, Leo. 2010/9/24 Mark Proctor <[email protected]> > On 24/09/2010 16:18, Leonardo Gomes wrote: > > Have a look here: http://www.drdobbs.com/184405218 > > here: http://blog.athico.com/2007/07/sequential-rete.html > > and here: http://herzberg.ca.sandia.gov/guidelines.shtml > > The easy answer for your question is "Yes" ;-) > > It depends :) > > In general a stateless session is just a convenience api for stateful, it > just wraps. So no performance gain at all. > > There is a "sequential" mode, but in all honest you won't get any > measurable perf gain. So I wouldn't use sequential mode for performance, the > only reason to use it is if you want your rules to execute sequentially. > > Mark > > > Cheers, > Leo. > > 2010/9/24 Harshit Bapna <[email protected]> > >> Hi All, >> >> In a scenario where lets say 10 rule are to be fired (in any order) in a >> stateless session than will I get the benefits of RETE algorithm (i.e >> increased performance). >> i.e Whether the engine will fire all the ten results in a parallel fashion >> or Whether the engine will file each rule one by one. >> >> How RETE algorithm will improve the performance of the engine for rules >> fired in stateless session ? >> >> >> _______________________________________________ >> rules-users mailing list >> [email protected] >> https://lists.jboss.org/mailman/listinfo/rules-users >> >> > > _______________________________________________ > rules-users mailing > [email protected]https://lists.jboss.org/mailman/listinfo/rules-users > > > > _______________________________________________ > rules-users mailing list > [email protected] > https://lists.jboss.org/mailman/listinfo/rules-users > >
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