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Large Scale and Big Data
book

Large Scale and Big Data

by Sherif Sakr, Mohamed Gaber
June 2014
Intermediate to advanced content levelIntermediate to advanced
636 pages
23h 13m
English
Auerbach Publications
Content preview from Large Scale and Big Data
223Algebraic Optimization of RDF Graph Pattern Queries on MapReduce
6.9.2 Case stuDy: imPaCt oF nesting anD lazy unnesting strategies
For graPh Pattern Queries with multivalueD ProPerties
This section presents a study on the impact of the proposed nesting and unnest-
ing strategies on minimizing the redundancy factor in intermediate results while
processing graph pattern queries. The comparative evaluation included two popular
relational-style systems, Apache Pig (Pig-Opt with COGROUP-based star-join com-
putation) and Hive (Hive), both of which support tuple-based algebra. NTGA-Opt
denotes NTGA with lazy partial unnesting strategy.
Setup and Testbed. Experiments were conducted on a 10-node Hadoop cluster
with Pig release 0.10.0, Hive 0.8.1
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Publisher Resources

ISBN: 9781466581500