Data Computation and Data Storage in Cloud Computing

With the continuous growth of the network bandwidth,the conditions are more mature that access non-local computing servic es through the network,so there is a technology what we call computing.The cloud computing is a new application model for de centralized computing which can provide reliable,customized and maximum number of users with minimum resource.With the constantly expanding and deepening of the cloud computing applications,it asks for higher demand,therefore,many researchers also strive to improve the cloud computing performance.The article explains the basic concepts of cloud computing.and on this basis,it also introduced the technology of data computation and data storage,it has a detailed description to the multi-user isolation mechanism,and finally to predict the development of cloud computing and its future.