同步复制技术可以保证移动数据库的一致性,是移动数据库的关键技术之一。本文针 对移动数据库的断接性、资源有限性等特点,分析同步复制技术现状,将开放的syncML 协议同步协议引入数据库,在分析syncML 同步协议组成和特点基础上,研究适用于移动数据库的双向事务级同步过程,克服目前移动数据系统同步处理算法中所存在的缺陷,有效保证移动数据库一致性,提高移动数据库的通用性和适应性;同时实现不同结构数据库间的数据同步,增强系统可扩充性。 关键字:syncML,同步过程,同步引擎,双向同步 Abstract: Synchronal replicate technology can ensure the consistency of mobile database. This paper is to analyze the current situation of synchronal replicate technology, and study the two-way sync applying to the displacement mobile database, to maintain the consistency of mobile database and improve availability and adaptability of mobile database. At the same time, it will realize the data synchronism of different database structures, to strengthen system extensibility. Key words:syncML, synchronization processing, Sync Engine, Two-way sync