基于数据块的关系数据库日志挖掘技术

摘要

The relational database can submit objects rapidly by means of the Redo log and also can record the operation process and the operation content. The most important method to realize database replication is transmitting and writing changed data in the disaster backup end through the analysis of the Redo log and the capturing of the changed data contents. The structure of Oracle Redo log file database is analyzed in this paper, and the header information of the log file is also stated. Considering the technology of Redo log file head positioning, the paper presents a Redo log database mining algorithm based on data block. The paper also validates the feasibility and reliability of the technology of the Redo log mining through the comparative analysis. Research direction is discussed at last.%在关系型数据库中数据库通过 Redo 日志来实现事物的快速提交，并记录事物的操作过程与操作内容。通过对 Redo 日志的分析与变化数据内容的捕获，将变化数据传送到灾备端，并在灾备端实现变化数据的写入，是目前数据库复制最主要实现原理。本文分析了 oralce 数据库 Redo 日志文件结构，阐述了日志文件头标志位信息。结合 Redo 日志文件头定位分析技术，给出了一种基于数据块的数据库 Redo 日志挖掘算法。通过测试分析，验证了该Redo日志挖掘技术的可行性与可靠性。最后展望了下一步的研究方向。