Too Long; Didn't Read
This article covers one of the secrets of high scalability and performance. A <a href="http://highscalability.com/flickr-architecture" target="_blank">blog post about Flickr Architecture</a> that has more than<a href="https://www.flickr.com/photos/franckmichel/6855169886" target="_blank"> 5 billions photos</a> brings us the following: <em>Caching and RAM are the answer to everything</em>.