Indiana University Bloomington

School of Informatics and Computing

Technical Report TR601:
RS-Algo: an Algorithm for Improved Memory Utilization in Continuous Query System under Asynchronous Data Streams

Nithya Vijayakumar and Beth Plale
(Oct 2004), 15 pages
Abstract:
In this TR we provide detailed results of measurements of the RS-Algo algorithm which dynamically adjusts the sliding window sizes used in database joins to reflect current stream rates. We tested under various queries and stream rate conditions using a synthetic workloads and using the dQUOB continuous query system. We examine service time and memory utilization. The second result chronicles a smaller experiment comparing two algorithms used during runtime to schedule events. We evaluated the performance of the existing algorithm, First Come First Serve (FCFS), against a modified version of Earliest Job First (EJF) and examined the impact on memory utilization.

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