Server-free backup method and system based on incremental bitmap between storage snapshots

Abstract

The invention relates to a Server-free backup method and system based on incremental bitmaps between storage snapshots. By using the function provided by a storage manufacturer to obtain data block bitmap changes between storage volume snapshots, and according to the incremental bitmap between snapshots The bitmap parses out the changed data blocks and offsets of the volume corresponding to the time point of the snapshot, so that only the changed data blocks in the snapshot need to be backed up. Compared with the prior art, the present invention solves the waste of storage space caused by full backup of cloned volumes on the backup server, reduces the backup time window, saves the IO overhead of the backup server, and can greatly improve the data backup of enterprises. The block data management capability improves the backup performance of Server‑free.

Description

technical field [0001] The invention relates to a backup method and system, in particular to a Server-free backup method and system based on incremental bitmaps between stored snapshots. Background technique [0002] In the fields of information technology and data management, along with the wide popularization of storage area network (SAN) devices, two backup methods, LAN-free and Server-free, have emerged. LAN-free means that the backup data directly backs up the data on the production server to storage through the SAN network. Although connecting the storage array and the production server through the FC switch greatly improves the high throughput and low latency in the network transmission process compared with the traditional backup technology, but this backup method still needs to occupy the resources of the production server. Server-free means that the backup process is completed inside the SAN, and a large amount of data flow does not need to flow through the produc...

AI Technical Summary

Problems solved by technology

[0007] The purpose of the present invention is to provide a kind of Server-free backup method and system based on the incremental bitmap between storage snapshots in order to overcome the above-mentioned defects in the prior art, which solves the problems caused by full backup of cloned volumes on the backup server. The storage space is wasted and the backup time window is reduced, which saves the IO cost of the backup server. At the same time, it can greatly improve the data management capabilities of enterprises in data backup, and improve the server-free backup performance.

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