摘要
Abstract
DDS,a international specification promulgated by Object-Manage-Group (OMG),focuses on real-time distribution system communication and puts forward the key Global Data Space ( GDS) thought,which is decoupling,real-time,high reliability and through-put. The communication model of the DDS is introduced,the logical relationship between the key roles is summed up,and the GDS idea analyzed. Then the Automatic Discovery Technology for remote entities,as the key technology of GDS,is researched,which includes two layer automatic discovery mechanism ( participant layer and pub-sub endpoint layer) ,protocol process of key entities,control logic,and refresh mechanism when joining or leaving. The technology can be used to design and develop system monitoring software,real-time mo-nitoring and analysis of system status information published and subscribed,recording historical data,providing a complete communication topology,which enables developers to better understand the distributed system,calibrate system design,deploy performance parameters and optimize system integration and extension.关键词
数据分发服务/发布-订阅/自动发现/全局数据空间Key words
data distribution service/publish-subscribe/automatic discovery/global data space分类
信息技术与安全科学
