title: apache hadoop versions 2.0 vs. 0.23
body: <p>There are so many Hadoop versions and different distributions which make me confused. I have a few questions.</p>
  
  <ol>
  <li>Apache Hadoop 1.x is from 0.20.205?</li>
  <li>Apache Hadoop 2.0 is from 0.22 or 0.23?</li>
  </ol>