I think I've read every post on highscalability.com, and this is by far the most deep and detailed writeup they've done. Lots of insight into the huge scale of justin.tv and what it takes to push that kind of traffic.
Highlight for me was discovering twicecache. Love the narrow scope and "fit" for the job it's intended for.
Twice is great for us, but it's one of those things that evolved to meet our specific needs and architecture. If I were starting a new Rails app tomorrow, I'd start with Varnish, and only move away from that if absolutely necessary.
Highlight for me was discovering twicecache. Love the narrow scope and "fit" for the job it's intended for.