Relational database data backtracking method for web development environment

A technology of development environment and backtracking method, applied in relational database, database model, database design/maintenance, etc., can solve the problems of database transaction log files, manual recovery, cumbersome process, etc.

Active Publication Date: 2020-06-30
ZHEJIANG UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The disadvantage of this method is that the access to the database will be affected when the full backup is performed, and the user experience is not good. At the same time, there are many database transaction log files that come with the database. When restoring, each log file needs to be manually restored, and the process is cumbersome.

Method used

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  • Relational database data backtracking method for web development environment
  • Relational database data backtracking method for web development environment
  • Relational database data backtracking method for web development environment

Examples

Experimental program
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Embodiment Construction

[0058] The present invention will be further described below in conjunction with the accompanying drawings.

[0059] refer to Figure 1 ~ Figure 3 A method for backtracking data in a relational database facing a Web development environment, comprising the following steps:

[0060] The first step is to establish a Web environment SeeLog log processing model, the process is as follows:

[0061]1.1 Automatically obtain SeeLog logs: In the web environment, when users operate the database, DML (Data Manipulation Language) statements will be executed, including: UPDATE, INSERT, and DELETE. After a DML statement is successfully executed, the log processing unit is triggered. Such as figure 1 As shown in (1), user requirements are sent to the server in parallel in the form of streams, and the DML statements in the requirements will trigger the log processing unit to write these DML statements into the memory in order of execution time. The log processing unit uses the idea of ​​AO...

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Abstract

The invention discloses a Web development environment-oriented relational database data backtracking method which comprises the following steps: 1, establishing a Web environment SeeLog log processing model, comprising the following procedures: 1.1, automatically acquiring a SeeLog log; 1.2, dynamically adjusting a persistent behavior of the log according to an algorithm; 1.3, performing a persistent operation by adopting a log segmentation strategy; 2, performing database recovery by adopting a TBack data backtracking mechanism, comprising the following procedures: performing data backtracking by utilizing a database event log once the database fails at a certain time point, and recovering the database to any time point before failure; and 3, immediately writing each event into a persistent layer by adopting a self-backup mechanism of a memory log, so that the memory log is not lost. According to the method disclosed by the invention, low-cost data backup can be realized, and the method can be independent of specific relational database kind or version.

Description

technical field [0001] The invention relates to a data backtracking method of a relational database under a Web development environment. Background technique [0002] With the development of the information age, proper preservation of data is essential. Data is usually stored in databases. Once the database fails, data will be lost. Therefore, database backup and recovery technology is particularly important. [0003] At present, the backup technology at the system application level mainly adopts the method of dual-machine hot backup; at the database level, common database backup and recovery schemes mainly include physical backup and logical backup. Physical backup needs to copy the physical files of the database (including control files, data files, log files, etc.) to the storage medium. According to the running state of the database at the time of backup, it is divided into two types: offline backup and online backup. Offline backup refers to copying the physical files...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G06F11/14G06F16/21G06F16/28
CPCG06F11/1471G06F11/1474G06F16/21G06F16/219G06F16/284G06F2201/80
Inventor 陆佳炜卢成炳李杰肖刚张元鸣徐俊周焕高燕煦马俊陈烘
Owner ZHEJIANG UNIV OF TECH
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