The reduces get it from the JobTracker. Take a look at TaskCompletionEvents.java.
Arun On Dec 27, 2011, at 1:26 AM, hadoop anis wrote: > > > Friends, > > I want to know where does information regarding completed MapTask get stored? > i.e. how reduce task know about completed map output data is available on > which tasktracker? > what data structure gets maintained to track for the map output data? > > If anyone know this please let me know. > > -- > Regards, > > Anis > Student MTech (Comp.Sci. & Engg) > > > > >
