一种高效的闪存数据库故障恢复方法MMR  

An Efficient Fault Recovery Technique MMR for Flash-Based Database

作　　者：王曼丽[1] 邢玉钢[1] 王翰虎[1,2] 马丹[1] 陈梅[1] 

机构地区：[1]贵州大学计算机科学与信息学院,贵州贵阳550025 [2]贵州星辰科技开发有限公司,贵州贵阳550025

出　　处：《计算机技术与发展》2012年第1期40-44,共5页Computer Technology and Development

基　　金：贵阳市2010年工业科技攻关项目([2010]筑科工合同字第28号);贵州大学2011年研究生创新基金资助项目(校研理工[2011039])

摘　　要：故障发生后,迅速而有效的恢复对闪存数据库而言是至关重要的。目前,相关研究者已提出了一些基于闪存数据库的故障恢复方法,但是这些方法都存在一些不足,如事务提交代价高、系统运行开销大等。文中针对闪存的特征,结合存储管理中基于日志更新方法的页内日志,讨论闪存数据库的恢复处理及其实现机制。通过记录内存日志实现事务故障恢复,建立镜像目录实现系统故障恢复。最后,通过实验验证了MMR在恢复时间和写操作数上都比传统的方法低。The rapid and efficient recovery iu the event of failures is very important for flash-based database. At present, relative research- ers have proposed some fault recovery methods for flash-based database, but these methods have some shortcomings such as the high cost of the transaction commits,the large of system operating costt and so on. In this paper,by characteristics of flash memory and combined with updated in the log data is used to discuss the recovery process and its implementation mechanism for flash-based database, By recording memory log implement transactional fault recovery, and establish system fault recovery by building mirror address direction. Finally,experimental results prove that in recovery time and write time MMR is less than traditional methods.

关 键 词：闪存数据库 故障恢复 内存日志 镜像地址目录 页内日志 

分 类 号：TP311[自动化与计算机技术—计算机软件与理论]