Indeed. I’m not even sure the post was talking about cache invalidation, more like what is the correct abstraction by which you cache something. I only truly u

Indeed. I’m not even sure the post was talking about cache invalidation, more like what is the correct abstraction by which you cache something. I only truly understood cache invalidation problems when I read Instagram’s engineering posts - then it dawned on me how hard it is for them to maintain a cached user profile database that has to spread over the entire world for a billion users (and potentially constantly be invalidated as users from around the world like their post etc).