同步復制技術可以保證移動數據庫的一致性，是移動數據庫的關鍵技術之一。本文針
對移動數據庫的斷接性、資源有限性等特點，分析同步復制技術現狀，將開放的syncML 協議同步協議引入數據庫，在分析syncML 同步協議組成和特點基礎上，研究適用于移動數據庫的雙向事務級同步過程，克服目前移動數據系統同步處理算法中所存在的缺陷，有效保證移動數據庫一致性，提高移動數據庫的通用性和適應性；同時實現不同結構數據庫間的數據同步，增強系統可擴充性。
關鍵字：syncML，同步過程，同步引擎，雙向同步
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