Placement-Safe Operator-Graph Changes in Distributed Heterogeneous Data Stream Systems
Pollner TN, Steudtner CT, Meyer-Wegener K (2015)
Publication Language: English
Publication Type: Conference contribution, Original article
Publication year: 2015
Publisher: Gesellschaft für Informatik (GI)
Series: Lecture Notes in Informatics (LNI) - Proceedings
City/Town: Bonn
Book Volume: P-242
Pages Range: 61-70
Conference Proceedings Title: Datenbanksysteme für Business, Technologie und Web (BTW 2015) - Workshopband
Event location: Hamburg
ISBN: 978-3-88579-636-7
URI: http://www6.informatik.uni-erlangen.de/publications/public/2015/btw15_pollner.pdf
Abstract
Data stream processing systems enable querying continuous data without first storing it. Data stream queries may combine data from distributed data sources like different sensors in an environmental sensing application. This suggests distributed query processing. Thus the amount of transferred data can be reduced and more processing resources are available.
However, distributed query processing on probably heterogeneous platforms complicates query optimization. This article investigates query optimization through operator graph changes and its interaction with operator placement on heterogeneous distributed systems. Pre-distribution operator graph changes may prevent certain operator placements. Thereby the resource consumption of the query execution may unexpectedly increase. Based on the operator placement problem modeled as a task assignment problem (TAP), we prove that it is NP-hard to decide in general whether an arbitrary operator graph change may negatively influence the best possible TAP solution. We present conditions for several specific operator graph changes that guarantee to preserve the best possible TAP solution.
Authors with CRIS profile
Thomas Niko Pollner
Chair for Computer Science 6 (Data Management)
Klaus Meyer-Wegener
Chair for Computer Science 6 (Data Management)
Related research project(s)
How to cite
APA:
Pollner, T.N., Steudtner, C.T., & Meyer-Wegener, K. (2015). Placement-Safe Operator-Graph Changes in Distributed Heterogeneous Data Stream Systems. In Ritter N, Henrich A, Lehner W, Thor A, Friedrich S, Wingerath W (Eds.), Datenbanksysteme für Business, Technologie und Web (BTW 2015) - Workshopband (pp. 61-70). Hamburg, DE: Bonn: Gesellschaft für Informatik (GI).
MLA:
Pollner, Thomas Niko, Christian Thomas Steudtner, and Klaus Meyer-Wegener. "Placement-Safe Operator-Graph Changes in Distributed Heterogeneous Data Stream Systems." Proceedings of the DSEP@BTW 2015, Hamburg Ed. Ritter N, Henrich A, Lehner W, Thor A, Friedrich S, Wingerath W, Bonn: Gesellschaft für Informatik (GI), 2015. 61-70.
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