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ESA
2008
Springer

More Robust Hashing: Cuckoo Hashing with a Stash

11 years 1 months ago
More Robust Hashing: Cuckoo Hashing with a Stash
Cuckoo hashing holds great potential as a high-performance hashing scheme for real applications. Up to this point, the greatest drawback of cuckoo hashing appears to be that there is a polynomially small but practically significant probability that a failure occurs during the insertion of an item, requiring an expensive rehashing of all items in the table. In this paper, we show that this failure probability can be dramatically reduced by the addition of a very small constant-sized stash. We demonstrate both analytically and through simulations that stashes of size equivalent to only three or four items yield tremendous improvements, enhancing cuckoo hashing's practical viability in both hardware and software. Our analysis naturally extends previous analyses of multiple cuckoo hashing variants, and the approach may prove useful in further related schemes.
Adam Kirsch, Michael Mitzenmacher, Udi Wieder
Added 19 Oct 2010
Updated 19 Oct 2010
Type Conference
Year 2008
Where ESA
Authors Adam Kirsch, Michael Mitzenmacher, Udi Wieder
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