工程数据库中一种支持合作设计事务的并发控制机制  

CONCURRENCY CONTROL OF SUPPORTING COOPERATION DESIGN TRANSACTION IN ENGINEERING DATABASE

作　　者：齐进[1,2] 张家明[1,2] 周伯鑫 徐南荣[1,2] 

机构地区：[1]中兴通讯南京研究所 [2]东南大学自动控制系

出　　处：《计算机研究与发展》1998年第11期987-990,共4页Journal of Computer Research and Development

基　　金：国家"八六三"计划CIMS主题基金

摘　　要：长期性、合作性与用户控制是工程设计环境对数据库事务的新要求，传统的并发控制机制缺乏支持．文中提出的嵌套二阶段有序相容性封锁协议以嵌套事务模型为基础，以有序相容性封锁为并发控制手段，能够较好地支持上述要求．此外由于该协议是基于二阶段封锁协议，因此易于在现有的ＤＢＭＳ中通过扩充来实现。Long duration,cooperation and user control are the new properties of engineering database transaction and the tranditional concurrency control mechanisms don't support them.Here presented is a new concurrency control mechanism which is named nested two phases locking protocol based on order compatibility locking.This protocol is based on nested transaction model,and makes use of order compatibility locking to schedule the design cooperation transaction,so it can support those new properties well.Because this protocol is a variant of two phases locking,it is easy to implement by improving the existing DBMS.

关 键 词：合作事务 并发控制 工程数据库 工程设计 

分 类 号：TB21[一般工业技术—工程设计测绘]