A QoS-Guaranteeing Scheduling Algorithm for Continuous Queries over Streams.

The increasing demand on streaming data processing has motivated the study of providing Quality of Service (QoS) for data stream processing. Especially for mission-critical applications, deterministic QoS requirements are always desired in order for the results to be useful. However, the best-effort QoS providing of most existing data stream systems would bring about considerable uncertainty to the query results. This paper attempts to provide a new insight into the problem of providing QoS guarantee for continuous queries over streams. Based on the proposed QoS model of stream processing, a QoS guaranteeing scheduling algorithm is proposed. Experimental results are presented to characterize the efficiency and effectiveness of our approaches. [ABSTRACT FROM AUTHOR]