With hundreds of millions of users, Twitter operates one of the world's largest real-time delivery systems, large enough and pervasive enough to exert noticeable "pressure" on the overall internet itself. At steady state, Twitter receives thousands of tweets a second that it needs to deliver to disks, in-memory timelines, email, and mobile devices. The name of the game for Twitter is "now", so those deliveries, which multiply according to the graph of who follows whom, need to occur in real-time. In this session, we will dive into both the "write path" and "read path" of Twitter to understand the architecture which supports those tweets, and also how Twitter serves them through one of the world's largest web sites.
animated slides available at animated slides available at http://www.youtube.com/watch?v=l55jFAGsgbs