Apache Hadoop 2.0 and YARN

                      


    

    Hadoop Release 2.0 provides many enterprise-class features , namely:

    YARN framework (MapReduce 2.0): YARN provides better resource management in Hadoop, resulting in improved cluster efficiency and application performance. This feature
not only improves the MapReduce data processing but also enables Hadoop usage in other data processing applications.

 

    HDFS High Availability (aka NameNode HA):In Hadoop 1.0 NameNode was the single point of failure(SPOF) in a cluster,
resulting in data loss in case of a NameNode failure. Hadoop 2.0 Architecture supports multiple NameNodes to remove this bottleneck. 

    HDFS Federation: This feature allow scalability for Hadoop file system.  

    There are additional features such as DataSnapshot,Support for Windows,NFS access which will increase Hadoop adoptionin the industry to solve big data
problems.