Abstract
The demand on mobile and real-time database application and service becomes increasingly extensive,so that competing for the limited resources and predicting workload imprecisely lead to abortion or restart for system even catastrophe.Because a real-time process scheduler using worst-case execution time is inefficient for optimizing performance,a scheduling algorithm for update transactions based on imprecise computation and feedback control loop was presented in this paper.A performance metrics based on validity in time domain and value domain was proposed to ensure the quality of service in mobile and real-time database systems.The algorithms and feedback control architecture can guarantee the transient and steady performance of Quality of Service(QoS),which is verified by simulation experiments.
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