Item Details

A QoS-Sensitive Approach for Timeliness and Freshness Guarantees in Real-Time Databases

Kang, KD; Son, S; Stankovic, J; Abdelzaher, T
Kang, KD
Son, S
Stankovic, J
Abdelzaher, T
The demand for real-time database services has been increasing recently. Examples include sensor data fusion, decision support, web information services, e-commerce, online trading, and data-intensive smart spaces. A real-time database, a core component of many information systems for real-time applications, can be a main service bottleneck. To address this problem, we present a real-time database QoS management scheme that provides guarantees on deadline miss ratio and data freshness, which are considered two fundamental performance metrics for real-time database services. Using our approach, admitted user transactions can be processed in a timely manner and data freshness can be guaranteed even in the presence of unpredictable workloads and data access patterns. A simulation study shows that our QoS-sensitive approach can achieve a significant performance improvement, in terms of deadline miss ratio and data freshness, compared to several baseline approaches. Furthermore, our approach shows a comparable performance to the theoretical oracle that is privileged by the complete future knowledge of data accesses.
Date Received
University of Virginia, Department of Computer Science, 2001
Published Date
Libra Open Repository
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