Messaging at Scale at Instagram - https://www.youtube.com/watch?v=E708csv4XgY https://www.youtube.com/watch?v=E708csv4XgY Covers many things but I specifically

Messaging at Scale at Instagram - https://www.youtube.com/watch?v=E708csv4XgY https://www.youtube.com/watch?v=E708csv4XgY Covers many things but I specifically got to understand how they use Redis to manage stuff like photo updates to follower / following lists.