改进的协同设计中问基多版本存储模型

摘要

为了增强协同设计过程中版本数据存取的可靠性,提高多版本查询检索效率,在分析其他多版本模型存取机制的基础上,针对协同设计树状多版本结构,提出了一种改进的使用中间基版本和相邻增量结合的多版本存储模型.考虑了多版本间变化差异的不均衡性,设计了基于评判阈值的中间基版本确定方法.实验结果表明,该模型在提高版本数据安全可靠性的同时,缩短了多版本还原生成消耗时间,优化了多版本树的整体性能.%To increase the safety and reliability ofversion data and improve searching efficiency of versions in computer support collaborative design (CSCD) process, a new multi-version storage strategy is proposed after analyzing the retrieval mechanism of other storage model based on multi-version tree.In this modal some versions are saved as entirety and others as incremental.An algorithm is designed to determine the base versions which are saved as entirety and the unbalanced difference between versions is considered as well.Results of the tests indicate the new multi-version storage model had better efficiency and optimization performance than other storage model,because the time spent regenerating all of the versions is reduced and the versions data reliability is improved at the same time.