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Comparison of parallel algorithms for path expression query in object database systems
Description
Proposes a new parallel algorithm for computing path expressions, named the "parallel cascade semi-join" (PCSJ) algorithm. Moreover, a new scheduling strategy called the "right-deep zigzag tree" is designed to further improve the performance of the PCSJ algorithm. The experiments have been implemented in a distributed and parallel NOW (network of workstations) environment. The results show that the PCSJ algorithm outperforms two other parallel algorithms [the parallel forward pointer chasing (PFPC) algorithm and the index-splitting parallel algorithm (IndexSplit)] when computing path expressions with restrictive predicates, and that the right-deep zigzag tree scheduling strategy has a better performance than the right-deep tree scheduling strategy.
Journal
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- Proceedings Seventh International Conference on Database Systems for Advanced Applications DASFAA 2001 DASFAA-01
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Proceedings Seventh International Conference on Database Systems for Advanced Applications DASFAA 2001 DASFAA-01 250-257, 2001-01-01
IEEE