i thought this was a little waffly, not that i could do better but it could have been clearer as to how to scale for success.
I'm interested in this as my latest site is exploding exponentially and were running into all the usual problems, lack of memory, trying to cache popular quires rather than hitting the mysql. etc. etc. I could really do with a good article about this subject.
But I did find two other links on scaling at YouTube if any one is interested:
http://highscalability.com/youtube-architecture
http://www.scribd.com/doc/244443/Supersising-YouTube-with-Py...