Re: [infinispan-dev] ISPN-200

Ok! Understood. So I'll try to use RpcManager to broadcast the query. Thanks! Israel On Fri, Jun 18, 2010 at 6:42 PM, Manik Surtani <manik(a)jboss.org&gt; wrote: > > 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 >