面向对象数据库管理系统(OODBMS)中内存的双缓冲管理机制  

Double Buffer Management Mechanism of Memory for OODBMS

作　　者：李德信[1] 罗刚[1] 应锦春[1] 赵华群 

机构地区：[1]西安理工大学,陕西西安710048 [2]陕西省电影电视学校,陕西西安710054

出　　处：《机电工程》2001年第4期36-39,共4页Journal of Mechanical & Electrical Engineering

摘　　要：对传统数据库管理系统中 ,内存管理的单缓冲机制存在的问题进行了分析 ;提出了适合于OODBMS中内存管理的双缓冲机制 ;把内存缓冲区分为页面缓冲区和对象缓冲区 ,实现了对缓冲区中对象的有效管理 ,从而使得对其访问和操作变得简单 ;给出了页面缓冲区调度管理算法 ;对象缓冲区管理采用对象描述器 (COD)和缓冲对象表 (COT)进行管理 ;对COD和COT的使用与收回进行了详细分析 ;Existing problems in single buffer management mechanism of traditional DBMS are carried through analysis. Double buffer management mechanism which is fit for OODBMS is put forward. Buffer of memory is divided into two parts. One is page buffer the other is object buffer. The validity of management for objects in buffer is realized. Thereby,call and operation of that become simple. Arithmetic of scheduling management for page buffer is presented;Management of object buffer is adopted the COD(Cached Object Descriptor)and COT(Cached Object Table)to manage;Particular analysis for being used and taken back of COD and COT is processed;The validity of the mechanism is proved by applied it to a practical system.

关 键 词：面向对象 数据库管理系统 内存 缓冲管理 

分 类 号：TP311.132[自动化与计算机技术—计算机软件与理论]