I.DATA STREAM MANAGEMENT SYSTEM
With the development of the Internet and data intensive applications, a large number of real-time online application requirements are produced, such as network security monitoring, network communication management, Web log analysis, sensor networks, financial data processing, stock analysis, etc.The data of these applications have the characteristics that continuity, large amount of data and fast generation and generation rate changes over time, etc. [1] And the data processing and requirements to achieve continuous query, sometimes requires real-time continuous queries. In the case of limited memory and processor resources, ensure the real-time data can be quickly and effective treatment is becoming more and more important. The traditional database management system is efficient in dealing with a limited store data, but data processing flow is inefficient, and even can't handle. So the data stream management system research becomes the hotspot in the field of database research.