title: How to get a consolidated value in map reduce having multiple reducers
body: <p>In map-reduce job, if you set 4 reducers to implement the reducer jobs. By doing this, the final output will generate 4 part-files. Like:</p>
  
  <pre><code>part-r-00001
  part-r-00002
  part-r-00003
  part-r-00004
  </code></pre>
  
  <p>In this scenario how to get a consolidated value? Say If I am calculating a maximum number? The above case will apparently generate 4 different files, which returns 4 different values.</p>