Extended Call Level Interface(CLI) for Real-time Main Memory Database Systems

초록

Traditionally, real-time database systems are used to manage environment data in computer control applications, such as plant control and flight control, programmed stock trading, automated manufacturing, military command and control area. The environment data is captured from sensors and stored in the real-time database. In these applications, real-time database systems must satisfy time constraints such as deadlines and update the data frequently to maintain its consistency. So, real-time database systems are designed to support applications in which the freshness of data and the timeliness of processing are important. This paper presents solutions to theses problem in real-time main memory database systems. First, we extends call level interface for supporting timing requirements. Extended CLI imposes priority and deadline of real-time transaction. Next, we supports real-time data for freshness of data. We are able to define real-time data that if it is not updated within a valid period it will lose its informational validity. We can define real-time data, specify time constraints of the data, and manage the information of updated time inside the system.