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The adaptive-hash join algorithm for a hypercube multicomputer

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2 Author(s)
Omiecinski, Edward ; Coll. of Comput., Georgia Inst. of Technol., Atlanta, GA, USA ; Lin, E.T.

The cube adaptive-hash join algorithm, which combines the merits of nested-loop and hybrid-hash, is presented. The performance of these algorithms is compared through analytical cost modeling. The nonuniform data value distribution of the inner relation is shown to have a greater impact than that of the outer relation. The cube adaptive-hash algorithm outperforms the cube hybrid-hash algorithm when bucket overflow occurs. In the worst case, this algorithm converges to the cube nested-loop-hash algorithm. When there is no hash table overflow, the cube adaptive-hash algorithm converges to the cube hybrid-hash algorithm. Since the cube adaptive-hash algorithm adapts itself depending on the characteristics of the relations, it is relatively immune to the data distribution

Published in:

Parallel and Distributed Systems, IEEE Transactions on  (Volume:3 ,  Issue: 3 )

Date of Publication:

May 1992

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