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Multi-fork diary memory continuous data protecting and restoration method

A data protection and logging technology, which is applied to the redundancy in the operation for data error detection and response error generation, etc., which can solve the problem that the data update operation from the host can no longer be accepted.

Inactive Publication Date: 2010-06-02
HUAZHONG UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The present invention provides a continuous data protection and recovery method for multi-fork log storage, which solves the problem that when the existing continuous data protection and recovery method recovers data to a certain time state, it can no longer accept the data update operation from the host

Method used

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  • Multi-fork diary memory continuous data protecting and restoration method
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  • Multi-fork diary memory continuous data protecting and restoration method

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Embodiment Construction

[0066] Process flow of the present invention such as figure 1 As shown, steps include initialization, judging user commands, judging whether a rollback operation has been performed, processing write operations of the first type, processing write operations of the second type, and processing recovery operations.

[0067] figure 2 It is a flow chart diagram of processing recovery operation steps of the present invention.

[0068] The present invention will be further described below in conjunction with embodiment.

[0069] Assume that before the system of the present invention is started, the source data area is divided into atomic data blocks as shown in Table 1 (the atomic data block size can be specified by the user as 2K, 4K, 8K, 32K, etc.):

[0070] Table 1

[0071] A

B

C

D

E

[0072] After the system of the present invention starts to protect the source data area, the write operation from the user performs multiple write operations...

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Abstract

The invention provides a continuous data protection and recovery method for multi-fork log memory, belonging to a computer data memory and backup method. The method solves the problem that the currentcontinuous data protection and recovery method can not receive the data updating operation of the host computer when the data is recovered to a certain time state. The invention comprises the steps of initiating, judging the commands of the user, judging that whether reverse rolling operation is carried out or not, processing the writing operation in a first class, processing the writing operation in a second class, and processing the recovery operation. Without affecting the data running, the continuous data protection and recovery method can continuously catches or tracks any changes of object data, and recover the data to any previous time point, and process the writing operation of the user after recovering the data in a source data area from a newer data state to an older time stateor from the older data state to a newer time state, continues to carry out the data updating operation to the recovered source data area and protects the data, and provides smarter recovery point of any object time.

Description

technical field [0001] The invention belongs to computer data storage and backup methods, in particular to a continuous data protection and recovery method for multi-fork 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. Online replication and data redundancy using disks became popular data protection techniques. [0003] Continuous Data Protection (CDP) is a method that ca...

Claims

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Application Information

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Patent Type & Authority Patents(China)
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