嵌入式实时数据库系统的存储管理  

Storage Management of an Embedded Real-Time Database System

作　　者：进才 刘云生[1] 覃飙[1] 陈基雄[1] 

机构地区：[1]华中科技大学计算机学院,湖北武汉430074

出　　处：《小型微型计算机系统》2003年第1期42-45,共4页Journal of Chinese Computer Systems

基　　金：国家自然科学基金项目资助 (60 0 730 45 );国防预研基金项目资助 (0 0 j15 .3.3JW0 5 2 9)

摘　　要：本文针对嵌入式系统的应用环境和实时数据库系统的数据特征 ,通过对各种存储器性能的比较 ,提出了嵌入式实时数据库系统的存储体系结构 .在此基础上 ,对读写速度不对称且写次数有限的存储器提出了一种合理的文件系统的物理结构和数据库的索引结构 ,减少写入次数以提高数据存取速度 ,并使写入次数均匀分布在存储器的各块中 ,以增加数据的可靠性延长存储器的寿命 .In this paper, we propose a storage architecture for an embedded real time database system according to the data character of real time application and the performance of the storage media . Based on the architecture, a physical file system structure and database index structure are presented for the media, whose writing speed and reading speed are asymmetrical and whose writing times are limited. Using the structure, data writing times to the memory are lessened and writing distribution to the media becomes balanced. This increases the reliability of the data and prolongs the life of the media. Data emplacement strategy for various characteristics data in real time database system are discussed under the storage architecture we proposed.

关 键 词：嵌入式实时数据库 存储层次 文件结构 索引结构 数据特征 数据安置 

分 类 号：TP311[自动化与计算机技术—计算机软件与理论]