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SHEPHERD: A Shipping-Based Query Processor to Enhance SPARQL Endpoint Performance.

Maribel AcostaMaria-Esther VidalFabian Flöck, Simón Castillo, Carlos Buil-Aranda, Andreas Harth

Veröffentlichung: 2014 Oktober
Art der Veröffentlichung: International Semantic Web Conference (Posters & Demos) 2014

Recent studies reveal that publicly available SPARQL endpoints exhibit significant limitations in supporting real-world applications. In order for this querying infrastructure to reach its full potential, more flexible client-server architectures capable of deciding appropriate shipping plans are needed. Shipping plans indicate how the execution of query operators is distributed between the client and the server. We propose SHEPHERD, a SPARQL client-server query processor tailored to reduce SPARQL endpoint workload and generate shipping plans where costly operators are placed at the client site. We evaluated SHEPHERD on a variety of public SPARQL endpoints and SPARQL queries. Experimental results suggest that SHEPHERD can enhance endpoint performance while shifting workload from the endpoint to the client.

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