Data information backup method and data backup method and device

Abstract

An embodiment of the invention provides a data information backup method and a data backup method and device. The data information backup method includes: intercepting a write request aiming at a disk; determining a to-be-visited target disk area corresponding to the write request, wherein the target disk area is at least one of the disk areas of the disk, and the disk areas are the basic units of the disk; changing the record identification, representing the target disk unit where the target disk area is located, in a data changing record corresponding to the disk into written identification, wherein the disk comprises a plurality disk units determined on the basis of the disk areas, the data changing record is pre-built in an internal memory and at least comprises the record identification and the disk units in one-to-one correspondence to the record identification. By the data information backup method, data information backup efficiency of the disk can be increased, and influence of the backup on the performance and continuity of operating business is lowered.

Description

technical field [0001] The invention relates to the technical field of data backup, in particular to a data information backup method, a data backup method and a device. Background technique [0002] In order to avoid data loss caused by the failure of the disk as a read-write device and to facilitate the management of the data content of the disk, there is a demand for backup of the disk. In the prior art, most disk backup methods are based on files and disk data blocks. Among them, the file-based backup method can use qcow2 and other formats to perform incremental backup, but due to the limitation of the file system, the performance of the disk during backup will be greatly reduced; while the disk data block-based backup method can easily perform full backup, but it must be Up to incremental backup needs further development, but this method can make full use of disk performance. However, for these two methods, they are all based on the file system, and the backup efficie...

AI Technical Summary

Problems solved by technology

Among them, the file-based backup method can use qcow2 and other formats to perform incremental backup, but due to the limitation of the file system, the performance of the disk during backup will be greatly reduced; while the disk data block-based backup method can easily perform full backup, but it must be Further development is required to incremental backup, but this method can make full use of disk performance

However, for these two methods, they are all based on the file system, and the backup efficiency is low. Moreover, in the backup process, in order to ensure the correctness of the data, the running business will be in an interrupted state. Due to the interruption time and the amount of business data This will undoubtedly lead to a great impact on the business performance and continuity of the running business during the backup process

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