title: Hadoop 3 : how to configure / enable erasure coding?
body: <p>I'm trying to setup an Hadoop 3 cluster.</p>
  
  <p>Two questions about the Erasure Coding feature :</p>
  
  <ol>
  <li>How I can ensure that erasure coding is enabled ?</li>
  <li>Do I still need to set the replication factor to 3 ?</li>
  </ol>
  
  <p>Please indicate the relevant configuration properties related to erasure coding/replication, in order to get the same data security as Hadoop 2 (replication factor 3) but with the disk space benefits of Hadoop 3 erasure coding (only 50% overhead instead of 200%).</p>