主动发布订阅分组拓扑和自配置策略

Grouped topology and self-reconfiguration strategy for active publish/subscribe system

为了提高主动发布/订阅系统中网络节点间的数据传输性能,加强系统的稳定性,针对主动发布/订阅系统的特性,提出了基于事件代理分组的拓扑模型。该方法的主要思路是采用多级分组的方法,先根据发布事件主题的匹配度,将属于同一匹配阀值区间的节点分为同一组;组内节点再根据事件属性的相似性利用聚类算法划分为不同子组。该自配置策略实现了动态分组的创建,代理节点加入和退出的管理。仿真实验表明,分组拓扑模型能有效减少节点间的平均转发次数及系统的拓扑维护开销,提高系统健壮性。

In order to optimize data transmission performance among nodes in the network of active publish/subscribe system and improve stability of the system,according to the characters of active publish/subscribe system,a grouped topology model based on event brokers is presented.The main idea of this method is using multi-level division,first,the brokers which belong to the same matching threshold interval are classified to the same group based on matching degree of event topic, and then event brokers of the same topic with similar attributes are classified to the subgroups.Self-reconfiguration is discussed,which realizes creation of groups and the management of brokers joining and removing dynamically.Simulation experiments show that grouped topology model can reduce the number of average transmission between brokers,expenses of topology maintenance and improve robustness of the system.