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ICDE
2000
IEEE

Dynamic Query Scheduling in Data Integration Systems

10 years 5 months ago
Dynamic Query Scheduling in Data Integration Systems
Execution plans produced by traditional query optimizers for data integration queries may yield poor performance for several reasons. The cost estimates may be inaccurate, the memory available at run-time may be insufficient, or data delivery rate can be unpredictable. In this paper, we address the problem of unpredictable data arrival rate. We propose to dynamically schedule queries in order to deal with irregular data delivery rate and gracefully adapt to the available memory. Our approach performs careful step-bystep scheduling of several query fragments and processes these fragments based on data arrivals. We describe a performance evaluation that shows important performance gains in several configurations.
C. Mohan, Françoise Fabret, Luc Bouganim, P
Added 01 Nov 2009
Updated 01 Nov 2009
Type Conference
Year 2000
Where ICDE
Authors C. Mohan, Françoise Fabret, Luc Bouganim, Patrick Valduriez
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