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Method and system for accomplishing data backup and recovery

A data backup and data technology, the redundancy applied in the operation is used for data error detection, response error generation and other directions, which can solve the problems of difficult data continuous protection and the limitation of the number of snapshot areas.

Inactive Publication Date: 2007-11-28
杭州信核数据科技股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0021] Due to the above-mentioned technical constraints, in the existing snapshot technology, the number of snapshot areas is limited, and it is difficult to achieve continuous protection of data

Method used

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  • Method and system for accomplishing data backup and recovery
  • Method and system for accomplishing data backup and recovery
  • Method and system for accomplishing data backup and recovery

Examples

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Embodiment Construction

[0126] The core idea of ​​the present invention is: adopt snapshot-based data backup and recovery technology, wherein when data is backed up, the address of the data unit that changes for the first time after a snapshot and the value before the change are recorded in a snapshot unit in the snapshot area ; When restoring data, read all snapshot units between the current moment and the moment to be restored, and restore data in the data storage area in chronological order.

[0127] In order to make the purpose, technical solution and advantages of the present invention clearer, the present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0128] Please refer to FIG. 3 and FIG. 4, FIG. 3 is a flow chart of the data backup method provided by the present invention, and FIG. 4 is a schematic diagram of the storage state of the storage medium of the data backup method provided by the present invention. The me...

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Abstract

The invention discloses a method to realize data backup and recovery, which is characterized by the following: arranging trigger snapshot event; choosing the time of trigger snapshot event as the snapshot time; recording the trigger snapshot event; distributing the address and the present value of the recorded data unit if receiving the modified order for the data unit before next event; executing the order; reading the snapshot unit between the present time and the recovery time; basing on the time order of distribution snapshot unit; writing the recorded data into the data unit of the snapshot unit recording address. This invention also discloses a system to realize data backup and recovery. This invention is fit for continuous protection of data.

Description

technical field [0001] The invention relates to data storage technology, in particular to a method and system for realizing data backup and restoration. Background technique [0002] Computer data is stored on computer storage media. To modify the data is to overwrite the original data with new data on the storage medium. In this way, the original data cannot be restored without special means. However, many applications in practice need to be able to restore the original data. For example, if a personal computer user performs certain operations that cause the system to crash, it is necessary to restore the original system data before performing these operations. Usually, data recovery is achieved by using a regular backup method, that is, the data is regularly backed up to the backup storage medium. If recovery is required, the data is imported from the backup storage medium to the original storage medium. The disadvantage of this method is that no matter whether the data ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F11/14
Inventor 任永坚
Owner 杭州信核数据科技股份有限公司
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