real scalability

http://highscalability.com/google-architecture  
"Now that you have a good storage system, how do you do anything with so much data? Let's say you have many TBs of data stored across a 1000 machines. Databases don't scale or cost effectively scale to those levels. That's where MapReduce comes in."

http://highscalability.com/youtube-architecture    Youtube runs on mysql. Cool!
The team:
2 sysadmins, 2 scalability software architects
2 feature developers, 2 network engineers, 1 DBA