Version management method and device for data backup
A technology of version management and data backup, which is applied in the direction of data error detection and response error generation, which can solve the problems of large space consumption and low backup efficiency, so as to save space and improve backup efficiency. Effect
Active Publication Date: 2012-12-19
LENOVO (BEIJING) LTD
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Problems solved by technology
[0007] The existing data backup method needs to perform a full backup periodically when performing file version management, which is equivalent to doing an initial backup every once in a while, which consumes a lot of space and the backup efficiency is not high
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[0061] In order to make the technical problems, technical solutions and advantages to be solved by the embodiments of the present invention clearer, the following will describe in detail with reference to the drawings and specific embodiments.
[0062] The embodiment of the present invention aims at the problems of large space consumption and low backup efficiency in the data backup method in the prior art, and provides a version management method and device for data backup, so that in the process of version merging, there is no need for each merged Versions are fully backed up to improve backup efficiency, and the merged old versions are deleted to save space.
[0063] Such as figure 1 As shown, the version management method of data backup in the embodiment of the present invention includes:
[0064] Step 101, receiving version management instructions;
[0065] Step 102, according to the version management instruction, if there is a modified version within the scope of the ...
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The invention provides a version management method and a version management device for data backup. The method comprises the following steps of: receiving a version management instruction; according to the version management instruction, if modified versions exist in a combined version range, copying the last modified version among the modified versions to a first file, and setting the old version number of the last modified version as a first version number, wherein the first version number is the version number of the last modified version in a first version range out of the combined version range; and all the version numbers in the first version range are smaller than the smallest version number in the combined version range; according to the version management instruction, if the lastmodified version is a deleted version in the combined version range, copying the last modified version in the first version range to a second file; and deleting all intermediate versions in the combined version range. The scheme improves backup efficiency and saves system space.
Description
technical field [0001] The invention relates to computer storage technology, in particular to a version management method and device for data backup. Background technique [0002] As the amount of data increases and its importance increases, the data backup system plays a very important role in the IT system for enterprises. As the name implies, data backup is to retain data in a certain way and periodically save it online The history of the data, so that when the online data is damaged, the backup data is used to restore to the state before the error occurred, so as to ensure the normal access of the data. [0003] Existing data backup methods mainly include three backup methods: full backup, incremental backup and differential backup, wherein full backup is to back up all selected folders, and does not rely on the archive attributes of files to determine which files to back up. In , any existing flags are cleared, and each file is marked as backed up, in other words, the ...
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IPC IPC(8): G06F11/14
Inventor 卢亿雷陈少为王哲
Owner LENOVO (BEIJING) LTD