| 摘要 |
<p>Disclosed are a data backup method, device, and system, used for adaptively selecting a backup data center (DC), and especially selecting a synchronous backup DC to perform synchronous data backup. The method in the embodiment of the present invention comprises: detecting a transmission state between a main DC and candidate backup DCs, the transmission state comprising transmission bandwidth and transmission delay; according to data sent by a user, the transmission state, and the expected number of copies N, selecting a target backup DC that meets a preset condition from the candidate backup DCs; and sending the data to the target backup DC, so that the target backup DC saves the copies of the data. By means of the technical solution of the embodiment of the present invention, quality of a network between a main DC and a target backup DC in a cloud storage system can be ensured, which improves the success rate of data uploading by a user and also enhances the efficiency of the cloud storage system.</p> |
