http://www.infoq.com/cn/articles/aws-s3-dive-in
http://baike.baidu.com/link?url=Jo9OQmjxXZLxyhc6JvaDwz1RkhYxEK4TRjZYXiqjKzcFfv4eeZq976bdPY6x-Pj-GUo2exEsE1Ayjtz1qZRYuMgXcbcBgTYcUe4XyR10V0_lBNQzMSCPOgOfElWW0zWH
http://www.cnblogs.com/softidea/p/6141710.html