Estimating accesses in partitioned signature file organizations
- 1 April 1993
- journal article
- Published by Association for Computing Machinery (ACM) in ACM Transactions on Information Systems
- Vol. 11 (2) , 133-142
- https://doi.org/10.1145/130226.145014
Abstract
We show that performance of some basic methods for the partitioning of signature files, namely Quick Filter and Fixed Prefix, can be easily evaluated by means of a closed formula. The approximation is based on well-known results from probability theory, and, as shown by simulations, introduces no appreciable errors when compared with the exact, cumbersome formulas used so far. Furthermore, we prove that the exact formulas for the two methods coincide. Although this does not imply that the two methods behave in the same way, it sheds light on the way they could be compared.Keywords
This publication has 4 references indexed in Scilit:
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