title: Reading large images from HDFS in mapreduce
body: <p>There is a very large image (~200MB) in HDFS (block size 64MB). I want to know the following:</p>
  
  <ol>
  <li><p>How to read the image in a mapReduce job? </p></li>
  <li><p>Many topics suggest WholeInputFormat. Is there any other alternative and how to do it?</p></li>
  <li><p>When WholeInputFormat is used, will there be any parallel processing of the blocks? I guess no.</p></li>
  </ol>