Hadoop gen1 vs Hadoop gen2

Question

I am a bit confused about place of tasktracker in Hadoop-2.x.

Daemons in Hadoop-1.x are namenode, datanode, jobtracker, taskracker and secondaryna

Answer 1

In Hadoop V2, they use YARN framework for replacing the older version. YARN has central resource manager component which manages resources and allocates the resources to the application. Multiple applications can run on Hadoop via YARN and all application could share common resource management.

http://saphanatutorial.com/how-yarn-overcomes-mapreduce-limitations-in-hadoop-2-0/