DATA INCREMENTAL BACKUP METHOD AND APPARATUS, AND NAS DEVICE

摘要

Disclosed are a data incremental backup method and apparatus, and a NAS device. The method comprises: segmenting data blocks; determining whether each data segment of the data blocks stored in a source end is correspondingly identical to each data segment of the data blocks stored in a destination end; and if not, sending, to the destination end for incremental backup, one or more data segments of the source end that are different from those of the destination end. Therefore, the problems in the related art that it is impossible to use a data backup function to perform reliable data incremental backup based on NDMP and a backup server is under heavy load are solved, so that data incremental backup can be realized based on NDMP, the load on the backup server is alleviated, and the bandwidth transmission is reduced.