1. Jonathan Abrams geekSessions July 31, 2007 Web Infrastructure: Surviving The “Hockey Stick”

2. Friendster Growth

6. Evite Session Management

11. How not to architect a “friend tracker” Tim adds a new photo -> update his 100 friends’ trackers Each user has their own tracker rows, sharded based on owner: insert into tracker (owner, user, date, type, param) values … For each trackable event, # of db writes = # of friends for that user …

12. A better “friend tracker” approach: Tim adds a new photo -> update his 100 friends’ trackers Each user has their own update rows, sharded based on user: insert into tracker (user, date, type, param) values … For each trackable event, # of db writes = 1 To compute someone’s “tracker”: for each of n shards: select * from tracker where user in (list), aggregate in the code …