title: How to use clusters in node js?
body: <p>I am very new to Node.js and express. I am currently learning it by building my own services. 
  I recently read about clusters. I understood what clusters do. What I am not able to understand is how to make use of clusters in a production application. </p>
  
  <p>One way I can think of is to use the Master process to just sit in front and route the incoming request to the next available child process in a round robin fashion. I am not sure if this is how it is designed to be used. I would like to know how should clusters be used in a typical web application.</p>
  
  <p>Thanks.</p>