Method for protecting and recovering continuous data based on time stick diary memory

A technology of data protection and recovery method, which is applied in the direction of redundancy in operation for data error detection, response error generation, etc. Effect

Inactive Publication Date: 2008-12-24
HUAZHONG UNIV OF SCI & TECH
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

This method is strictly sequential, and wri

Method used

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  • Method for protecting and recovering continuous data based on time stick diary memory
  • Method for protecting and recovering continuous data based on time stick diary memory
  • Method for protecting and recovering continuous data based on time stick diary memory

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Embodiment Construction

[0045] Process flow of the present invention such as figure 1 As shown, it includes an initialization step, a step of judging a user command, a step of processing a write operation, and a step of processing a recovery operation.

[0046] figure 2 It is a flow chart diagram of processing recovery operation steps of the present invention.

[0047] The storage continuous data protection and recovery method based on timestamp logs is implemented at the device level. It captures the I / O requests of the underlying volume, marks these requests with timestamps, and saves the atomic data blocks that change each time. It saves the data changes and the corresponding time stamps, which is equivalent to saving the data log of each data block change on the time axis, so as to restore the data state at any time in the past in the future.

[0048] The present invention is described in further detail below in conjunction with embodiment.

[0049] (1) Initialization steps: such as image 3...

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Abstract

The invention relates to a method for the protection and recovery of continuous data stored in a time-stamp diary, which pertains to a computer data storage and backup method and aims at reducing the time of processing a write operation and a recovery operation and increasing processing parallelism. The method comprises the steps that: (1) a storage area is divided into a source data area and a continuous data protection area; a Hush mapping table is initialized; (2) a user command is judged, and the write operation is carried out sequentially; the recovery operation is carried out as the step (4); (3) the write operation is processed; by adopting a production line strategy, a copy operation and a new write operation are carried out in parallel; a source data record is inserted into the Hush mapping table; the step (2) is carried out; (4) the recovery operation is processed, and the source subdata block record needing copying is searched in the Hush mapping table; corresponding source subdata block record is written into the source data area by adopting the production line strategy; then the step (2) is carried out. The proposal of time-stamp diary storage is adopted in the invention; the production line strategy is adopted when the write operation and the recovery operation are processed; therefore, write operation processing time and target recovery time are shorter.

Description

technical field [0001] The invention belongs to computer data storage and backup methods, in particular to a continuous data protection and recovery method based on time stamp log storage. Background technique [0002] The rapid growth of data and the high availability and security requirements of data have stimulated the development of storage technology. Storage technology has become a key factor in IT infrastructure. Storage network provides 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. If mirroring technology is used to obtain multiple backups at different points in time, the resulting capacity consumption and loss of business perform...

Claims

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Application Information

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IPC IPC(8): G06F11/14
Inventor 刘景宁冯丹周可李祚衡杨天明毛文娟
Owner HUAZHONG UNIV OF SCI & TECH
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