The Great Disk Drive in the Sky How Web giants store bigand we mean bigdata

Data needs at Amazon, Microsoft, and Google have driven the development of distributed file systems such as GFS and Dynamo.

The decisions and trade-offs of each can explain a lot about why cloud services work the way they do�and why they sometimes don't behave well at all.

Source:
http://arstechnica.com/business/news/2012/01/the-big-disk-drive-in-the-sky-how-the-giants-of-the-web-store-big-data.ars