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0引言随着存储技术、虚拟化、分布式计算、云计算等网络技术及新概念的快速发展,通过网络提供一种可配置的、虚拟化的存储及数据服务方式,逐渐形成了人们研究的热点,即云存储。与传统的存储方式相比较而言,它能够将网络中不同类型的存储资源,通过分布式文件系统、分布式计算或网格计算等形式集合起来协同工作,从而提高现有硬件对数据的存储和处理能力。由此可以看出,云存储系统是由网络存储设备、分布式文件系统、数
0 Introduction With the rapid development of network technologies and new concepts such as storage technology, virtualization, distributed computing and cloud computing, a configurable and virtualized storage and data service mode is provided through the network, Hot spots, namely cloud storage. Compared with the traditional storage methods, it can gather different types of storage resources in the network through distributed file system, distributed computing or grid computing and other forms of work together to improve the existing hardware storage of data And processing power. It can be seen, cloud storage system consists of network storage devices, distributed file system, the number of