Issue No. 01 - February (1992 vol. 4)
DOI Bookmark: http://doi.ieeecomputersociety.org/10.1109/69.124899
<p>G.H. Gonnet and P.A. Larson (1982) proposed a hashing scheme for external files which guarantees single access retrieval. They provided an asymptotic analysis of the scheme assuming uniform distribution of the signatures. This paper addresses an open problem posed by them in a second work (J. ACM, vol.35, no.1, p.161-84, 1988) about the performance of signatures having a skew distribution. An optimization problem is formulated to obtain the optimal signature distribution which maximizes the resulting load factor. Numerical results indicate that the optimal signature distribution results in significant reduction in the cost of insertions, which is of practical significance.</p>
signature hashing; external files; single access retrieval; asymptotic analysis; skew distribution; optimization problem; load factor; database theory; file organisation; optimisation
E. Ramos and M. Ramakrishna, "Optimal Distribution of Signatures in Signature Hashing," in IEEE Transactions on Knowledge & Data Engineering, vol. 4, no. , pp. 83-88, 1992.