A data-centered transaction scheduling strategy of realtime database in micro-satellite ground test system

This paper studies a transaction scheduling problem in the micro-satellite ground test system. real-time database system is the fundament in data collection, analysis and processing in the test systems. This paper emphasizes on the problem of the failure to deal with abnormal data timely in realtime database system, which will seriously affect the test system validation. Firstly, a real-time database model is designed against large quantity test data, complex data type and tough real-time demand. Then the Data-Centered Transactions Schedule (DCTS) model and the corresponding priority assignment algorithm are presented. Finally, the efficiency, accuracy and effectiveness of algorithms are validated by using mathematical simulation. Computational results demonstrate the effectiveness of the algorithms.