Velocity 2009: Fixing Twitter: Improving the Performance and Scalability of the World's Most Popular Micro-blogging Site

Fixing Twitter: Improving the Performance and Scalability of the World's Most Popular Micro-blogging Site: Velocity 2009 - O'Reilly Conferences, June 22 - 24, 2009, San Jose, CA: "Twitter (twitter.com) is a micro-blogging service that allows users to answer the question “What are you doing?”. It takes a simple 140 character string (a tweet), and distributes that to a user’s following (or “friends”) list.
Over the last few years, Twitter has experienced a variety of challenges scaling its site to serve millions and millions of users."