基于分布式内存数据的数据同步设计与实现

在变电站综合自动化系统中,需要对遥测、脉冲、遥信等实时数据进行处理,由于电力系统对这些数据的存取具有较高的实时性,因此监控系统通常会采用实时数据库进行数据的存储管理。随着监控系统需要处理数据单元的增加和机器节点数的增长,监控系统普遍采用分布式内存数据库进行实时数据的存储。分布式内存数据库的一个重要问题就是如何实现多个机器节点之间的数据更新同步,提出了利用多播和TCP实现快速有效的数据同步方式,支持灵活的组网方式,并设计了一套稳定可靠的数据传输机制,使得分布式内存数据库的各个节点的数据保持良好的一致性。

Design and implementation of data synchronization based on distributed memory database

Because the high requirement for real-time data processing of telemetering,pulses and remote signals in substa-tion automation systems,the real-time database is often adopted in the monitoring system for data storage management. With the increase of data units and machine nodes which need to be processed by the monitoring system,the distributed memory data-base is generally used in the monitoring system to executed the real-time data storage. An important issue of distributed memory database is how to synchronize the data among lots of machine nodes efficiently. A mode which utilizes the multicast and TCP to achieve rapid and effective data synchronization and support the flexible networking is proposed in this paper. A set of stable and reliable data transmission mechanism was designed to make the data of each node of distributed memory database maintain their consistency.