title: Install Sahara in OpenStack
body: <p>I have already installed OpenStack following the tutorial from <a href="http://ilearnstack.com/2013/04/26/setting-up-a-single-node-openstack-environment/" rel="nofollow">here</a>.</p>
  
  <p>I want to install <code>Apache Hadoop</code> on <code>OpenStack</code> and I saw <a href="http://architects.dzone.com/articles/openstack-savanna-fast-hadoop" rel="nofollow">here</a> that first I have to install <code>DevStack</code> before I install <code>Sahara(Savanna)</code></p>
  
  <p>My question are: -</p>
  
  <ul>
  <li>Is it necessary to install <code>DevStack</code></li>
  <li>Is there any other tutorial for Sahara installation except <a href="http://docs.openstack.org/developer/sahara/userdoc/installation.guide.html" rel="nofollow">this</a>.</li>
  </ul>