Memcached has become the de facto standard for caching web applications. But, many users jump in feet first without understanding what it does or perhaps more importantly what it does not do. Once you understand memcached, you may come to realize that it is what it does not do that makes it so good. Memcached is a distributed memory based caching system. But, what does that mean for you? This session willcover the basics of memcached. What are all the components needed? Where is your data cached? What happens when there is a system failure? Is my data stored in more than one place? How do I know what isin my cache? All these questions and more will be answered.