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Fast Join Implementation on Modern Multi-Core CPUs

Fast Join Implementation on Modern Multi-Core CPUs

陈傲天
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Join is an important database operation. As computer architectures evolve, the best join algorithm may change hand. This paper reexamines two popular join algorithms – hash join and sort-merge join – to determine if the latest computer architecture trends shift the tide that has favored hash join for many years. For a fair comparison, we implemented the most optimized parallel version of both algorithms on the latest Intel Core i7 platform. Both implementations scale well with the number of cores in the system and take advantages of latest processor features for performance.
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