title: URL Shortener for high traffic website
body: <p>we have a high traffic website with the 500K daily sessions and at least  6 million contents ( and our growth is 1 million monthly), we're using <em>goo.gl</em> shortener system, but we've decided to setup ours,( in-house shortener system).</p>
  
  <p>I've searched for shortener opensource systems and also I'd worked with <a href="https://yourls.org/" rel="nofollow noreferrer">YOURLS.ORG</a> in the small and medium project but I'm not sure it could work with high scale/traffic website, So What do you suggest us? </p>
  
  <p><strong>FYI</strong>: our website is based on PHP + MYSQL (but we could treat it as a micoro service in our system and it could be written in any language)</p>