Research On Small Cipher File Storage Management In Storage Cloud Environment

As the springing up of cloud computing and software as service these days,the cloud storage becomes a hot research object in the field of information storage. In the internal cloud storage environment, large amount of encrypted small files are collected by manual and stored in centrally. To manage this high-data density files set efficiently,the problems of low space utilization of small file, big metadata content consume should be delt with and services supported by internal cloud work well,such as random to access file, cipher file full index and search, and security data backup. Also, efficient to manage cipher files is a basic function, include the access of control, dynamically change the cipher key, flexibly manage data with rule of partition and resources monitoring. System's security and performance must be tradeoff in internal cloud storage.In this paper,we present a storage management architecture for large small cipher files in internal storage cloud. Its core idea is NoSQL and based on open cloud storage system, with feature of document oriented store and backup and efficient to random access and dynamic key changed. Thinking of file security by itself when file up download and query, the role of access control together with the value constraint based security model(VCBS) , are used to strength system's small cipher file security.Finally, based on the aforesaid achievements, a prototype MStore is designed and implemented, under open system Hadoop and used in the encryption full-text retrieval system: Mimir. A performance about file uploaded and response time testing is conducted on the experimental environment of Mimir. Review of the whole system, the balance between efficiency and security of the system is coordinate at some degree.