协同设计过程中迟到者加入算法研究

Study of latecomer algorithm in CSCD

协同设计过程中,经常会有成员随时加入协作过程。迟到者要能够赶上协作过程,并且不影响其他协作成员的工作。分析了迟到者加入机理,采用了一种基于设计历史的操作日志的方法,通过日志数据库游标的设置与协同系统锁定技术的运用,实现了迟到者快速与其他成员达到同步。本算法支持多个迟到者同时加入系统,保证了不论是因为协作成员自身原因还是突发外部故障,用户都能跟上协作过程,提高了协作环境的容错性。

There always come new members to the cooperative process in a CSCD(computer supported collaborative design) environment. Those latecomers need to catch up with the design process without disturbing existing cooper-ators. This paper analyzes latecomers joining mechanism and adopts the algorithm of operation log based on design history, with an aim to ensure rapid synchronization between latecomers and other cooperators by using database cursor and system locking techniques. This algorithm not only can enhance the applicability of the CSCD platform, but also support the comeback of crashed cooperative computers. It improves the capability of fault toleration of the cooperative environment by ensuring the cooperators can trace the process easily.