High-trafficked websites require high-performance scaling techniques. One such technique is to implement a caching mechanism to decrease data processing and server load while increasing speed of delivery. Many caching solutions exist, but few are as efficient (or as free, as in freedom) as memcached. Memcached is a fast and easy-to-use distributed caching server. This talk will introduce memcached, explain how it works and how to use it with PHP, and offer suggestions and scenarios for using memcached to provide a variety of caching solutions for data and sessions.