【作者】 张冬冬； 李建中； 王伟平； 郭龙江；

【机构】 哈尔滨工业大学计算机科学与技术学院； 黑龙江大学计算机科学与技术学院；

【摘要】 <正>1问题的提出近年来,数据流数据在应用系统中频繁地出现,它不同于传统的存储在关系表中相对静止的数据,而是以一种流的形式源源不断地进入应用系统。典型的数据流数据包括股票交易所的股票价格信息数据,网络与道路交通监测系统的监测信息数据,环境更多还原

【Abstract】 Recently,technique for data stream system becomes a hot research issue.It is hard to store unlimited continuous stream data in limited-space memory in data stream system.The current research work is mainly focused on dealing with the recent arrival data in memory,but not suitable to the historical stream data.We propose an approach to store and query historical stream data.With sampling historical data,unlimited historical stream data can be stored in limited-space disk.With HDS-tree,indexing the aggregation of historical stream data in memory, all kinds of aggregation query over history data can be supported in real time.The analytical conclusions and experimental results show that our approach can be applied to data stream system effectively.更多还原