Long-distance duplicating system and method

Abstract

The invention provides a long-distance duplicating system and a long-distance duplicating method. The method comprises the following steps that: when sending backup data to a long-distance duplicating receiving end, a long-distance duplicating sending end only sends log data, which are changed at the current duplicating transmission time point relative to the previous duplicating transmission time point, of the long-distance duplicating sending end to the long-distance duplicating receiving end; and the long-distance duplicating receiving end calculates the log data at the current duplicating transmission time point of the long-distance duplicating sending end according to the changed log data as well as the log data, calculated by the long-distance duplicating receiving end last time, of the long-distance duplicating sending end, and reconstructs metadata according to the calculated log data. By the method, the data transmitted by network in the long-distance duplicating process can be reduced substantially to realize the precision and high efficiency of the transmission.

Description

technical field [0001] The invention relates to the field of computer application technology, in particular to a remote copy system and method thereof. Background technique [0002] The rapid growth of data and the high availability and security requirements of data have stimulated the development of storage technology. [0003] Storage technology has become a key factor in IT infrastructure, and storage networks provide an effective hardware foundation for mass storage and sharing of data. In the face of massive data, data protection and disaster recovery are becoming more and more important. However, the original data protection methods, such as tape backup, have disadvantages such as large backup window, long recovery time, poor real-time response, and affecting normal business. meet current needs. Online remote replication and data redundancy using disks have become popular data protection techniques. [0004] Generate a usable copy of the data in another place in rea...

AI Technical Summary

Problems solved by technology

The advantage of this method is that data replication does not occupy host resources. The disadvantage is that the storage system of the disaster recovery center and the storage system of the production center have strict compatibility requirements. Generally, storage systems from the same manufacturer are required. The s

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