Abstract: As a new branch of disaster tolerance, Continuous Data Protection(CDP) overcomes the weakness of traditional data backup and snapshot technology, protecting critical data with novel method. The working flow of Continuous Data Protection was first introduced, then problems leading to data inconsistency in CDP were analyzed, and some technologies employed for data consistency protecting were summarized and analyzed. The future research direction in CDP data consistency protection was pointed out.

Key words: Continuous data protection, Data consistency, Data recovery in disaster