This paper put foreword a general architecture of cloud storage system, and discusses the key technologies. It is a new network storage services, cloud storage is an extension of the concept of cloud computing and developed a new concept. The architecture of cloud storage is based on it conception and the proposed hierarchical and the discussed key technologies involving data organization, virtual storage, Data Duplication, security, etc, etc. With the development of cloud computing and global data growth, it will get more attention and will be developed well.
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