METHOD, APPARATUS AND SYSTEM FOR ACCESSING DATA IN CLOUD STORAGE

摘要

A method, apparatus and system for accessing data in cloud storage are disclosed. Steps of storing data include: creating data check values of original data to be stored in a data transmitting terminal (S101); transmitting the original data and the data check values to different cloud storage data centres for storing in accordance with pre-configured redundancy storing policy (S102). Steps of retrieving data include: based on an access request, accessing the cloud storage data centre storing the original data in accordance with the pre-configured redundancy storing policy (S201); determining whether the original data stored in the cloud storage data centre is available (S202); if no, retrieving the data check value of the original data and data used for creating the data check value from the other cloud storage data centre (S203); recovering the original data according to the data check value and the data used for creating the data check value (S204). This technical solution improves availability and fault tolerance of data in cloud storage.