title: MongoDB Scalable setup
body: <p>Hello every i already setup this.</p>
  
  <ol>
  <li>MongoDB Replica Sets with 3 members.</li>
  <li>Enable indexing</li>
  <li>Enable Oplog on my node.js app</li>
  </ol>
  
  <p>I would like to ask other tips/guides how to optimize my mongodb.
  It is good way to add Members in Replica set? or add a sharding?</p>