title: elasticsearch - querying multiple indexes is possible?
body: <p>I have an elasticsearch cluster with 3 indexes:</p>
  
  <pre><code>/users/user
  /events/visit
  /events/register
  /pages/page
  </code></pre>
  
  <p>So, now I need to run queries processing multiple indexes.</p>
  
  <p>Eg: <strong>Get gender of users registered in page X.</strong>
  (<em>To get this info, I need infos from multiple indexes.</em>)</p>
  
  <p>Is this possible? Maybe integrating hadoop?</p>