Re: [infinispan-dev] ISPN-200

On 9 Jun 2010, at 05:45, Israel Lacerra wrote: > Manik, > > About the "map" part of the map/reduce of ISPN-200. > > Looking in the code, my intention is(briefly) create a ReplicableCommand in CacheQueryImpl and then use RpcManager to make the query on all nodes. > > But ISPN-200 depends on ISPN-39, right? Well, not precisely. They are related and a degenerate case of ISPN-39 *could* work for you, but isn't necessary. Let me explain: ISPN-39 is about pushing tasks to nodes based on key. So, you may say something like, here's a task, T, which requires keys K1, K2, K3. The DistributionManager could then be used to determine the most appropriate node(s) to send T to, and process it there. Now in the case of ISPN-200, you don't know which nodes contain the entries you are looking for. So you would need to broadcast the task, T, which in this case is a query task, to *all* nodes. So while it is similar to ISPN-39 in that it executes remote tasks, the logic of determining which nodes to execute the task on is different - you would need to execute the task on all nodes all the time. Hope this clarifies things a bit. :) Cheers Manik > This dependecy is about the map part? The idea behind ISPN-39 is to migrate a computation to other nodes? Like a "continuation"? And then ISPN-200 will use this api to make the query on all nodes? > > > thanks! > > Israel > > > _______________________________________________ > infinispan-dev mailing list > infinispan-dev(a)lists.jboss.org > https://lists.jboss.org/mailman/listinfo/infinispan-dev -- Manik Surtani manik(a)jboss.org Lead, Infinispan Lead, JBoss Cache http://www.infinispan.org http://www.jbosscache.org _______________________________________________ infinispan-dev mailing list infinispan-dev(a)lists.jboss.org https://lists.jboss.org/mailman/listinfo/infinispan-dev