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CostFed: Cost-Based Query Optimization for SPARQL Endpoint Federation
University of Leipzig.
University of Leipzig.
University of Leipzig.
Linköping University, Department of Computer and Information Science, Database and information techniques. Linköping University, Faculty of Science & Engineering.ORCID iD: 0000-0002-1741-2090
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2018 (English)In: Proceedings of the 14th International Conference on Semantic Systems, SEMANTICS 2018, Vienna, Austria, September 10-13, 2018, Elsevier, 2018, Vol. 137, p. 163-174Conference paper, Published paper (Refereed)
Abstract [en]

The runtime optimization of federated SPARQL query engines is of central importance to ensure the usability of the Web of Data in real-world applications. The efficient selection of sources (SPARQL endpoints in our case) as well as the generation of optimized query plans belong to the most important optimization steps in this respect. This paper presents CostFed, an index-assisted federation engine for federated SPARQL query processing. CostFed makes use of statistical information collected from endpoints to perform efficient source selection and cost-based query planning. In contrast to the state of the art, it relies on a non-linear model for the estimation of the selectivity of joins. Therewith, it is able to generate better plans than the state-of-the-art federation engines. Our experiments on the FedBench benchmark shows that CostFed is 3 to 121 times faster than the current federation engines.

Place, publisher, year, edition, pages
Elsevier, 2018. Vol. 137, p. 163-174
Series
Procedia Computer Science, E-ISSN 1877-0509
National Category
Computer Sciences
Identifiers
URN: urn:nbn:se:liu:diva-168661DOI: 10.1016/j.procs.2018.09.016ISI: 000471255100015OAI: oai:DiVA.org:liu-168661DiVA, id: diva2:1461724
Conference
14th International Conference on Semantic Systems
Projects
CENIIT project no. 17.05Available from: 2020-08-27 Created: 2020-08-27 Last updated: 2021-09-20

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Hartig, Olaf

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CiteExportLink to record
Permanent link

Direct link
Cite
Citation style
  • apa
  • ieee
  • modern-language-association-8th-edition
  • vancouver
  • oxford
  • Other style
More styles
Language
  • de-DE
  • en-GB
  • en-US
  • fi-FI
  • nn-NO
  • nn-NB
  • sv-SE
  • Other locale
More languages
Output format
  • html
  • text
  • asciidoc
  • rtf