Today, most of the cloud vendors provides database as a service to store the users' application data in their server. Now cloud computing meets the problem in data backup. The data backup is necessity when there is network or cloud service vendor failure. The important problem in the cloud computing is migrating their data from one cloud vendor to another. To changing the cloud vendor user needs data backup. Most of the cloud vendors providing these backup services at high cost, but it is more expensive for the users and IT organizations.