Amazon cloud powered by close to 500,000 servers

http://www.wired.com/wiredenterprise/wp-content/uploads//2012/03/AmazonDataCente

How many servers does Amazon use to keep its EC2 platform afloat? 445,000. That is, according to Huan Liu, a researcher with Accenture Technology Labs, who came up with this number after a little bit of digging and number crunching. 

His analysis found that Amazon’s main cluster of servers, 322,000 of them, are located in Northern Virginia. Outside of the US however, Amazon has a relatively small footprint. For example in Brazil, there are only 1600 EC2 servers. 

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Story added 15. March 2012, content source with full text you can find at link above.