Cloud computing is developed on the basis of grid computing is an emerging computing model. This paper introduces the definition of cloud computing and architecture, and applications, cloud platforms from a deeper level of analysis of the nature of the cloud, the cloud of the current mainstream key technologies in detail. Finally a hot topic of cloud computing and cloud computing system that the current problems to be solved and future research directions, can provide reference for cloud computing research.%云计算是在网格计算的基础上发展而来的,是一种新兴的计算模型;介绍了云计算的定义和体系结构以及应用,从云平台的层次更深刻地剖析云计算的本质,对目前主流的云计算关键技术进行了详细介绍;最后讨论了云计算的热点问题,并指出了当前云计算系统亟待解决的问题与下一步的研究方向,可为云计算相关研究提供参考.
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