- 0.21 - Aug 2010 -- A widely used release. This eventually became the Hadoop 1.0 release.
- 0.23 - Feb 2012 -- Was a branch created to add new features. This branch eventually became Hadoop 2.0
- 1.0 -- Current production version of Hadoop
- 2.0 -- Current development version of Hadoop
This
is currently the production version of Hadoop. It has been in wide use
for a while and has been proven in the field. The following
distributions are based on Hadoop 1.0
- Cloudera's CDH 3 (Cloudera's Distribution of Hadoop) series
- HortonWorks's HDP 1 (HortonWorks Data Platform) series
This is a development branch of Hadoop. Hadoop 2 has
significant new enhancements. It has been under development for a
while. Hadoop 2 has the following new features:
The following distributions currently bundle Hadoop 2:
- HDFS fail over
- Federated NameNode
- Map Reduce version 2 (MRV2) also known as YARN
The following distributions currently bundle Hadoop 2:
- Cloudera's CDH4 (Cloudera's Distribution of Hadoop) series.
- HortonWorks HDP2 (Hortonworks Data Platform) series.
