Release 2.0.0-alpha available

This is the first (alpha) version in the hadoop-2.x series.

This delivers significant major features over the currently stable hadoop-1.x series including:

HDFS HA for NameNode (manual failover)
YARN aka NextGen MapReduce
HDFS Federation
Performance
Wire-compatibility for both HDFS and YARN/MapReduce (using protobufs)

Please see the Hadoop 2.0.0-alpha Release Notes for details.

2012 May 23

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