Project supported by the National Natural Science Foundation of China(Nos.60933005 and 91124002);the National High-Tech R&D Program(863)of China(Nos.2010AA012505,2011AA010702,2012AA01A401,and 2012AA01A402);the National 242 Foundation(No.2011A010);the National Technology Support Foundation(Nos.2012BAH38B04 and 2012BAH38B06)
Cloud computing is deemed the next-generation information technology(IT) platform, in which a data center is crucial for providing a large amount of computing and storage resources for various service applications wit...