基于C/S模式的同步协同设计运行机制和策略

Mechanism and Strategy of Synchronous Cooperative Design Based on Client／Server Mode

文章在深入分析国内外协同设计研究背景的基础上，提出了一种在传统单机版本CAD系统的基础上构造协同设计平台、实现多机网络版CAD系统的方法，描述了系统各个主要功能模块的具体实现方案。在实现方案中重点介绍了并发控制的实现机制，提出了不完全加锁和令牌加锁的新方法。

： This paper analyzes the research work of CSCD by experts from China or other country．Based on this，we bring forward a method to create a CSCD platform upon the traditional single－location CAD system to implement a multi－user CAD system．Realization of the pivotal modules of the new system is described thoroughly．We put an emphasis on the mechanism of concurrency control and provide two new methods：incomplete lock and token lock．We also give a conclusion in the end．