title: Understanding Hive MR Output
body: <p>When I run a Hive statement and the corresponding MR jobs are launched it usually has a line like:</p>
  
  <blockquote>
    <p>Stage-Stage-1: Map: 33  Reduce: 131   Cumulative CPU: 8006.47 sec   HDFS Read: 1280804751 HDFS Write: 279261996966 SUCCESS</p>
    
    <p>Total MapReduce CPU Time Spent: 0 days 2 hours 13 minutes 26 seconds 470 msec</p>
  </blockquote>
  
  <p>I had some questions about interpreting that line.</p>
  
  <ol>
  <li>What units are the numbers 1280804751, 279261996966 in? Bytes? Blocks? Any way to convert them to human-readable format?</li>
  <li>What does the "Total MapReduce CPU Time Spent" mean? What does "Cumulative CPU" mean?</li>
  </ol>