How would you build a chat service that needed to handle 7.5 million concurrent players, 27 million daily players, 11K messages per second, and 1 billion events per server, per day? What could generate so much traffic? A game of course. League of Legends. League of Legends is a team based game, a multiplayer online battle arena (MOBA), where two teams of five battle against each other to control a
![How League of Legends Scaled Chat to 70 million Players - It takes Lots of minions. - High Scalability -](https://cdn-ak-scissors.b.st-hatena.com/image/square/fd7880d7ead7c13e8c9af71b88b948209b779ff4/height=288;version=1;width=512/https%3A%2F%2Ffarm4.staticflickr.com%2F3931%2F15319028040_2c841d841e_m.jpg)