Abstract
Abstract The impact of network layer assumptions on the performance of the concurrency control protocol in distributed real-time database systems is studied by modeling the network layer as ATM networks instead of conventional simple constant delay centers. The results show that the unpredictable behaviour of the underlying network will give non-constant network transit time which in turn can cause significant adverse impact on the performance of the protocol. In this study, a dynamic deadline assignment scheme is proposed to reduce the impact of the underlying network and to improve the system performance.
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