The Hadoop 2.x GA is nothing less that a big leap forward. Most of the features released such as YARN - a pluggable resource management framework, Name Node HA, HDFS Federation and so on were long awaited. As per the official mail to the community, this release includes:
"To recap, this release has a number of significant highlights compared to Hadoop 1.x:
• YARN - A general purpose resource management system for Hadoop to allow MapReduce and other other data processing frameworks and services
• High Availability for HDFS
• HDFS Federation
• HDFS Snapshots
• NFSv3 access to data in HDFS
• Support for running Hadoop on Microsoft Windows
• Binary Compatibility for MapReduce applications built on hadoop-1.x
• Substantial amount of integration testing with rest of projects in the ecosystem
Please see the Hadoop 2.2.0 Release Notes for details."
Also as per the official email to the community, users are encouraged to move forward to the 2.x branch which is more stable & backward compatible.
"To recap, this release has a number of significant highlights compared to Hadoop 1.x:
• YARN - A general purpose resource management system for Hadoop to allow MapReduce and other other data processing frameworks and services
• High Availability for HDFS
• HDFS Federation
• HDFS Snapshots
• NFSv3 access to data in HDFS
• Support for running Hadoop on Microsoft Windows
• Binary Compatibility for MapReduce applications built on hadoop-1.x
• Substantial amount of integration testing with rest of projects in the ecosystem
Please see the Hadoop 2.2.0 Release Notes for details."
Also as per the official email to the community, users are encouraged to move forward to the 2.x branch which is more stable & backward compatible.
