|Published on 2009-04-12 by John Collins.|
Aditya Agarwal, Director of Engineering at Facebook, gives an excellent presentation on the architecture of Facebook with a focus on the LAMP (Linux Apache MySQL PHP) based components:
Facebook: Science and the Social Graph
The numbers are very impressive!
Updated 2021 : note that the above post was originally published in 2009, but is left here for archival purposes.