2 Hits in 7.2 sec

Robust Runtime Optimization and Skew-Resistant Execution of Analytical SPARQL Queries on Pig [chapter]

Spyros Kotoulas, Jacopo Urbani, Peter Boncz, Peter Mika
2012 Lecture Notes in Computer Science  
We describe a system that incrementally translates SPARQL queries to Pig Latin and executes them on a Hadoop cluster.  ...  To be robust against cost estimation errors, our system interleaves query optimization with query execution, determining the next steps to take based on data samples and statistics gathered during the  ...  Spyros Kotoulas and Jacopo Urbani were partially supported by EU project LarKC (FP7-215535) and the Yahoo! Faculty Research Engagement Program.  ... 
doi:10.1007/978-3-642-35176-1_16 fatcat:bkrhd4o36jfnnnm7iuiebaqtm4

Belief Change and Argumentation in Multi-Agent Scenarios (Dagstuhl Seminar 13231) Virtual Realities (Dagstuhl Seminar 13241)

Jürgen Dix, Sven Hansson, Gabriele Kern-Isberner, Guillermo Simari, Sebastian Maneth, Gonzalo Navarro, Guido Brunnett, Sabine Coquillart, Robert Van Liere, Gregory, Andreas Harth, Craig Knoblock (+2 others)
2013 unpublished
The author firmly believes in the applicability of the current web architecture in the extended industrial enterprise, and is looking forward to discuss and exchange views on the current trends, challenges  ...  , and state of the art solutions.  ...  Assuming a number of independent Linked Data sources (SPARQL endpoints), we have designed a framework and optimized distributed query processing of SPARQL queries over RDF data [10] .  ...