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Dimensioning a multiple hashing scheme
Part of
A. D. Barbour, R. M. Phatarfod
Journal:

Journal of Applied Probability / Volume 34 / Issue 2 / June 1997

Published online by Cambridge University Press:

14 July 2016, pp. 477-486

Print publication:

June 1997
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The number of items of data which are irretrievable without additional effort after hashing can be greatly reduced if several hash tables are used simultaneously. Here we show that, in a multiple hashing scheme, this number has a distribution very close to Poisson. Thus choosing the number and sizes of the tables to minimize the expected number of irretrievable items is the right way to dimension a scheme.

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Dimensioning a multiple hashing scheme