• Over four billion Web pages, each an average of 10KB, all fully indexed
• Up to 2,000 PCs in a cluster
• Over 30 clusters
• 104 interface languages including Klingon and Tagalog
• One petabyte of data in a cluster -- so much that hard disk error rates of 10-15 begin to be a real issue
• Sustained transfer rates of 2Gbps in a cluster
• An expectation that two machines will fail every day in each of the larger clusters
• No complete system failure since February 2000

...from an article at ZDnet on Google and how it all works.

...via JoHo the Blog