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As the development of vocational work applications online in military group, the requirements for continuous protection, disaster-tolerant security, read/write speed of data storage, are getting higher and higher. To meet these requirements, a big data continuous protection system (BDCPS) is designed, by simply adding a storage device and deploying related software, without changing the existing storage scheme architecture, in order to achieve the backup at regular time, continuous data protection, inquiry and statistics of data at block level, and to improve storage security, disaster tolerance and read/write speed of data storage.