FYI only.. A nice paper which give some insight on infra storage structures within google. Scable to petabyte levels.

To appear in Nov/2006 : Operating System Design and Implementation, 7th Symposium.

http://labs.google.com/papers/bigtable.html

MSFT research thesis in with the boxwood project .

http://research.microsoft.com/research/sv/Boxwood/

Both articles are are good , intensive read ..have fun :)-