title: hadoop: difference between 0 reducer and identity reducer?
body: <p>I am just trying to confirm my understanding of difference between 0 reducer and identity reducer. </p>
  
  <ul>
  <li>0 reducer means reduce step will be skipped and mapper output will be the final out</li>
  <li>Identity reducer means then shuffling/sorting will still take place? </li>
  </ul>