基于操作日志的完井数据同步模型

摘要

同步技术是提高移动数据库系统性能的一项关键技术。依托完井移动平台，结合完井业务数据，提出一种基于操作日志的移动数据同步处理模型，重点分析了该模型中的日志序列的生成以及冲突的消解，并给出了具体的实现算法。该模型允许移动终端在断接状态下对本地副本数据进行操作，并通过移动事务日志记录用户行为，当重新连接时，根据服务器返回的日志序列进行同步处理，使系统最终收敛于一致性状态。同时还引入了日志合并、时间戳等方法，有效减少了移动终端的资源消耗，提高了同步效率。实验表明该算法能快速高效地完成客户端与服务器之间的数据更新与交互。%Synchronization technology is one of the key techniques to promote the performance of mobile database systems. This paper which relied on the well completion mobile platform and integrated the well completion business data proposed a mobile data synchronization model which is based on operation log. In this model, the generation of log sequences, and the resolution of conflicts are discussed in detail, and the implementation algorithm is proposed. In this model, mobile devices are allowed to access the local copy data and locally commit the mobile transactions when the system is disconnected, meanwhile the user behavior can also be recorded in the mobile transaction log. According to the log sequence which is returned by the synchronous server, the mobile devices can update the local data when the system is reconnected to ensure the consistency of data. Besides, by introducing the merger of log and time-stamp into the model, the model can reduce the resource consumption, and improve the efficiency of the synchronization. The experiments proved that the algorithm can exchange the well completion business data between mobile devices and synchronization server rapidly and efficiently.