Re: [infinispan-dev] Rethinking asynchronism in Infinispan

Dnia środa 13 styczeń 2010 o 15:22:01 napisałeś: Speaking of which... I ran into a problem in JBoss Cache some time ago (it's one of those not yet reported ;) ) with aynchronous replication and non-blocking state transfer. AFAICS Infinispan uses the same replication mechanism as JBC, so I think it's relevant here. The thing is that the "asynchronous" replication uses the usual method of submitting a task to an Executor. This is no problem without NBST, because the tasks are not interested in responses and finish immediately, but with NBSP they need responses to facilitate replay. And since they need to wait for responses, they clog the Executor's threads and under sufficiently heavy load, it all degrades to effectively synchronous replication. And it happens quite fast, really. The good news is that I fixed it. The bad news is that it's not something that can really be put in public view :) But the approach is to use asynchronous API in JGroups - one of the castMessage() overloads that accepts a RspCollector. That way I made the async replication really asynchronous, and so far it works without problems :) -KS