I've noticed that Hadoop MapReduce 1.0.4 was released in 12 October 2012,
and Hadoop 0.23.4 was released in 15 October 2012. I thought that with
Hadoop 1.0, the Hadoop 0.2X had become discontinued. If I want to start to
use Hadoop MapReduce, which version should I use?
What's the difference between Hadoop MapReduce 0.2X and Hadoop MapReduce