Simon Willison’s Weblog

Sunday, 14th February 2010

Redis in Practice: Who’s Online? Using Redis to implement a “which of your friends are online now” feature, by maintaining a set of active user IDs for every minute, then intersecting the past five minutes of user IDs with a set containing the IDs of your friends. # 5:17 pm

A new Buzz start-up experience based on your feedback. Buzz is switching to the more obvious model: use existing Gmail behaviour to suggest a list of people to follow, rather than auto-following them. It feels pretty clear to me that this is how following recommendations should work. # 10:12 am