Impressive stats for 1 x Varnish - 1 x Nginx/Node.js - 1 x MongoDB architecture. And about MongoDB:
While we tried to make MongoDB non-relational, it almost never worked. TV-Guide data contains several many-to-many relationships, and you simply can’t store them as nested objects. […] What MongoDB really does well, though, is make every JOIN explicit. This encouraged us to denormalize data onto the most specific documents to avoid a second query.
I file AolTV as a solid Node.js + NoSQL database application.
Original title and link: AolTV Powered by Node.js and MongoDB ( ©myNoSQL)