Re: [infinispan-dev] Infinispan - Hadoop integration

On 13 March 2014 22:05, Mircea Markus <mmarkus(a)redhat.com&gt; wrote: > > On Mar 13, 2014, at 20:59, Ales Justin <ales.justin(a)gmail.com&gt; wrote: > >>> - also important to notice that we will have both an Hadoop and an Infinispan cluster running in parallel: the user will interact with the former in order to run M/R tasks. Hadoop will use Infinispan (integration achieved through InputFormat and OutputFormat ) in order to get the data to be processed. >> >> Would this be 2 JVMs, or you can trick Hadoop to start Infinispan as well -- hence 1JVM? > > good point, ideally it should be a single VM: reduced serialization cost (in vm access) and simpler architecture. That's if you're not using C/S mode, of course. ? Don't try confusing us again on that :-) I think we agreed that the job would *always* run in strict locality with the datacontainer (i.e. in the same JVM). Sure, an Hadoop client would be connecting from somewhere else but that's unrelated.