Facebook is now running 10,000 servers, including 1,800 MySQL servers that are overseen by just two database administrators.
MySpace has had better uptime than Facebook thus far in 2008, and both are faring better than LinkedIn.
Facebook will lease an entire data center building in Santa Clara, California, and is expected to spend $200 million on capital expenditures in 2008.
Facebook said it opened a new Virginia data center because it had maxed out space in its California data centers.
Gartner cites strong server sales for Rackable, which is likely driven by recent orders from Facebook and Amazon (AMZN).