From http://highscalability.com/scaling-digg-and-other-web-applications, about a Digg presentation at Web 2.0 Expo. Key points: Scale out, not up (ie, more servers, not bigger servers) by partitioning users off Scale databases both horizontally and vertically (eg, split users horizontally, questions on dedicated db) Hide partitioning from the application Problems of denormalization (copies of the...