協(xié)同設(shè)計的版本管理應(yīng)支持設(shè)計全過程，對設(shè)計過程中的整個歷史過程的版本都應(yīng)予以保留。如果所有版本采用完整存儲，版本存取速度快，但需要大量的存儲空間，而且存儲的冗余信息量大；若采用差值存儲雖然可以節(jié)省大量的存儲空間，版本的存取速度要受影響。因此本文從數(shù)據(jù)存儲的角度討論了版本管理的內(nèi)容，提出兩種差值存儲模型，構(gòu)造了版本存儲閾值來將差值存儲與完整存儲相結(jié)合，從而有效地在空間效率和時間效率上進(jìn)行平衡，不僅提高了版本存取的響應(yīng)時間又減少存儲空間。
關(guān)鍵字：協(xié)同設(shè)計 版本管理 完整存儲 差值存儲 存儲閾值
Abstract：Version management of collaborative design should support the whole course of design, and all version of design during the course must be stored. Taking full storage of all versions, version accesses fast, but they need a mass of storage space and storing redundancy information of version is very big. Although taking difference storage can save a mass of storage space, version accesses slowly. So in this paper we discuss the content of version management from data storage, and put forward two models of difference storage. Constructing storage threshold unites difference storage and full storage in order to balance space efficiency and time efficiency. It not only improves the answer time of version access but also reduces storage space.
Keywords: collaborative design, version management, full storage, difference storage, storage threshold