Real life architectures

Want to know how the architectures in real world which scale to millions of users looks like? Visit highscalability.com, You can find these information for google, amazon, youtube and flickr.

Google Architecture
http://highscalability.com/google-architecture

Amazon Architecture
http://highscalability.com/amazon-architecture

YouTube Architecture
http://highscalability.com/youtube-architecture


Flickr Architecture
http://highscalability.com/flickr-architecture

There are more real life architectures and you can find it here.

Highscalability.com is really a great work and i had added it to my rss feed list.