title: Unicorn vs Puma in clustered mode
body: <p>I've always used <code>unicorn</code> as my application server but relatively recently I noticed that <code>puma</code> now has the <code>clustered mode</code>, so I wonder if there is any reason to use <code>puma</code> in the <code>clustered mode</code> instead of <code>unicorn</code> considering that my code is not thread-safe and therefore I can't use threads?  </p>
  
  <ul>
  <li>I am using MRI 2.2</li>
  </ul>