Thanks Vinod On Monday, April 22, 2013, Vinod Kumar Vavilapalli wrote:
> > It is the same as all other communication in Hadoop: Hadoop RPC which in > turn is java RPC over a TPC connection. > > Thanks, > +Vinod Kumar Vavilapalli > Hortonworks Inc. > http://hortonworks.com/ > > On Apr 22, 2013, at 8:27 AM, Rahul Bhattacharjee wrote: > > Hi, > > Tasktracer runs each of the tasks (M or R) in a separate VM (considering > VM reuse is disabled).So the actual task and task tracer daemon run in two > different OS processes. Umbilical interface is used by tasks to send its > progress to the task tracer. > > Considering that both are different process then how is the umbilical > interface implemented ? shared file , sockets (unlikely) or .. > > Thanks, > Rahul > > >
