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Self-organizing files with dependent accesses

Published online by Cambridge University Press:  14 July 2016

Kin Lam,
Ming-Ying Leung and
Man-Keung Siu
Kin Lam*
Affiliation:
University of Hong Kong
Ming-Ying Leung*
Affiliation:
University of Hong Kong
Man-Keung Siu*
Affiliation:
University of Hong Kong
*
∗ Postal address: Department of Statistics, University of Hong Kong.
∗∗ Postal address: Department of Mathematics, University of Hong Kong.
∗∗ Postal address: Department of Mathematics, University of Hong Kong.
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Abstract

We analyze certain self-organizing filing techniques when accesses are assumed to be dependent on each other. The stream of requests for accessing records in a file is modelled as a Markov chain. A general framework is introduced to obtain the asymptotic search cost of a memory-free self-organizing heuristic. The move-to-front heuristic is studied in detail. A formula for the asymptotic search cost, which generalizes that in the case of independent accesses, is obtained. Numerical examples on the performance of the transposition heuristic are provided, and compared with that of the move-to-front heuristic.

Keywords

LINEAR SEARCHMOVE-TO-FRONT RULETRANSPOSITION RULE

Information

Type
Research Papers
Information
Journal of Applied Probability , Volume 21 , Issue 2 , June 1984, pp. 343 - 359
Copyright
Copyright © Applied Probability Trust 1984 

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