内存数据库故障恢复策略研究  

Research on Memory Database Failure Recovery Strategies

作　　者：张效尉[1] 王大羽[1] 

机构地区：[1]周口师范学院计算机科学与技术学院,河南周口466001

出　　处：《科技广场》2012年第4期57-60,共4页Science Mosaic

基　　金：河南省教育厅自然科学研究计划项目(2007520061)

摘　　要：内存数据库存在于易失性内存中,数据较易丢失,故障恢复部件至关重要。考虑系统环境限制,设计了一种利用日志与影子页面技术相结合的系统恢复模型,讨论了日志协议、模糊检查点策略、重装算法、恢复技术等模块的实现方法。该方法无需额外硬件的支持,日志记录数量少,检查点与事务处理并发执行,重装和恢复过程快速,极大地提高了内存数据库的恢复效率。Memory database exists in volatile memory, and the data is easy to lose, thus failure recovery com- ponent is crucial. Considering the constraints of system environment, this paper designs a kind of system recovery model which combines log with shadow page technique, discusses the implementation methods of log protocol, fuzzy checkpoint strategy, reload algorithm, and restore technology and so on. This method does not need addition- al hardware support, and with the advantages of few log record numbers, checkpoint and transaction process paral- lel execution, quickly reload and recovery process, it greatly enhances the recovery efficiency of memory database.

关 键 词：内存数据库 日志 检查点 重装 恢复 

分 类 号：TP311[自动化与计算机技术—计算机软件与理论]