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Data Backup Method and Apparatus, Data Restoration Method and Apparatus, and Server
Data Backup Method and Apparatus, Data Restoration Method and Apparatus, and Server
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机译:数据备份方法和装置,数据恢复方法和装置以及服务器
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摘要
A data backup method and apparatus, a data restoration method and apparatus, and a server are presented. The backup method includes the following steps of obtaining, by a backup server, an original differential bitmap of a first target volume; obtaining valid data in each fixed-length data block from the first target volume according to the original differential bitmap; saving a bitmap corresponding to a fixed-length data block including the valid data to a fixed-length volume bitmap file of the fixed-length data block according to the original differential bitmap; and saving the valid data in the fixed-length data block to a fixed-length volume file of the fixed-length data block. According to the foregoing solution, only valid data is transmitted, an amount of data transmitted between the production end and the server can be reduced, a transmission speed can be increased, and storage space can be saved.
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