Design of a Modern Cache

http://highscalability.com/blog/2016/1/25/design-of-a-modern-cache.html

Caching is a common approach for improving performance, yet most implementations use strictly classical techniques. In this article we will explore the modern methods used by Caffeine, an open-source Java caching library, that yield high hit rates and excellent concurrency. These ideas can be translated to your favorite language and hopefully some readers will be inspired to do just that.