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Semantic Partitioning for RDF Datasets

  • Georgia Troullinou
  • Haridimos KondylakisEmail author
  • Dimitris Plexousakis
Conference paper
Part of the Communications in Computer and Information Science book series (CCIS, volume 760)

Abstract

Today we are witnessing an explosion in the size and the amount of the available RDF datasets. As such, conventional single node RDF management systems give their position to clustered ones. However most of the currently available clustered RDF database systems partition data using hash functions and/or vertical and horizontal partition algorithms with a significant impact on the number of nodes required for query answering, increasing the total cost of query evaluation. In this paper we present a novel semantic partitioning approach, exploiting both the structure and the semantics of an RDF Dataset, for producing vertical partitions that significantly reduce the number of nodes that should be visited for query answering. To construct these partitions, first we select the most important nodes in a dataset as centroids, using the notion of relevance. Then we use the notion of dependence to assign each remaining node to the appropriate centroid. We evaluate our approach using three real world datasets and demonstrate the nice properties that the constructed partitions possess showing that they significantly reduce the total number of nodes required for query answering while introducing minimal storage overhead.

Notes

Acknowledgements

This research is implemented through IKY scholarships programme and co-financed by the European Union and Greek national funds through the action entitled “Reinforcement of Postdoctoral Researchers”, in the framework of the Operational Programme “Human Resources Development Program, Education and Lifelong Learning” of the National Strategic Reference Framework (NSRF) 2014−2020.

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Copyright information

© Springer International Publishing AG 2017

Authors and Affiliations

  • Georgia Troullinou
    • 1
  • Haridimos Kondylakis
    • 1
    Email author
  • Dimitris Plexousakis
    • 1
  1. 1.Institute of Computer ScienceFORTHHeraklionGreece

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