Multikey access methods based on term discrimination and signature clustering

Author:

Chang J. W.1,Lee J. H.1,Lee Y. J.

Affiliation:

1. Department of Computer Science, KAIST, P.O. Box 150, Chongryang, Seoul, Korea

Abstract

In order to improve the two-level signature file method designed by Sacks-Davis et al. [20], we propose new multikey access methods based on term discrimination and signature clustering. By term discrimination, we create separate, efficient access methods for the terms frequently used in user queries. We in addition cluster similar signatures by means of these terms so that we may achieve good performance on retrieval. Meanwhile we provide the space-time analysis of the proposed methods and compare them with the two-level signature file method. We show that the proposed methods achieve 15-30% savings in retrieval time and require 3-9 % more storage overhead.

Publisher

Association for Computing Machinery (ACM)

Subject

Hardware and Architecture,Management Information Systems

Reference21 articles.

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1. Inverted files versus signature files for text indexing;ACM Transactions on Database Systems;1998-12

2. A Survey of Access Methods for Image Data;International Journal of Software Engineering and Knowledge Engineering;1997-09

3. The HS file: A new dynamic signature file method for efficient information retrieval;Lecture Notes in Computer Science;1994

4. Performance comparison of signature-based multikey access methods;Microprocessing and Microprogramming;1992-09

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