METHOD, SYSTEM AND COMPUTER-READABLE MEDIUM FOR SYNTHETIC INCREMENTAL DATA BACKUP

A method for synthetic incremental data backup, a corresponding system and a corresponding computer-readable medium are provided. The method is executed by a data device and a backup device and includes: generating an incremental backup data and an incremental block change record (BCR) of an N-th backup according to a current data of the data device of an M-th backup and a current data of the data device of the N-th backup, wherein N is an integer greater than or equal to three and M is a positive integer less than N; generating a synthetic backup data and a synthetic BCR of the N-th backup according to a synthetic backup data and a synthetic BCR of the M-th backup and the incremental backup data and the incremental BCR of the N-th backup; and storing the synthetic backup data and the synthetic BCR of the N-th backup in the backup device.