5BUYYA R, YEO C S, VENUGOPAL S,et al. Cloud computing and emerging IT platforms: Vision, hype, and reality fordelivering computing as the 5th utility [J]. Future Generation Computer Systems, 2008, 25 (6) : 599 - 616.
6GHEMAWAT S, GOBIOFFH, LEUNG P T. The Google file system[C]. Proceedings of the 19th ACM Symposium on Operating SystemsPrinciples,New York: ACM Press, 2003.29 - 43.
7Aljenaa, E. , Al-Anzi, F. S. , & Alshayeji, M. (2011). To- wards an efficient e-learning system based on cloud computing [ C ]. In Proceedings of the Second Kuwait Conference on e-Services and e-Systems (KCESS '11). ACM, New York, NY, USA ,(13):1-7.
8Bakia, M. , Murphy, R. , Anderson, K. , & Estrella-Trinidad, G. (2011 ). International experiences with technology in education: Final re- port[ R]. U. S. Department of Education, Office of Educational Technolo- gy-.
10Huang Wen, Zhao Yixia , Xiao Yun, & Sun Xinghua(2011 ). A cloud service environment framework for SCORM compatible content [ C ]. Circuits, Communications and System (PACCS), 2011 Third Pacific-A- sia Conference : 1-4.