Eve Online chat is moving to ejabberd

I am player at heart. I do not have time to play much, but since my young years, I have always been fascinated by gameplay mechanisms, to the point I am more interested in understanding the game design than by the act of playing the game. Even if I do not have much time to […]

Cardinality Estimation

In server world, we always need to maintain some metrics; We need to measure to improve. A very common one being “unique active user” per unit of time. While this is really easy to describe, it’s complex when it comes to implementation. Naive implementation logs all events (let say, user connection), either on memory or […]