Title: A statistics-based approach to incrementally update inverted files
Authors: Shieh, WY
Chung, CP
資訊工程學系
Department of Computer Science
Keywords: information retrieval;inverted file;incremental update;statistical approach;spare space
Issue Date: 1-Mar-2005
Abstract: Many information retrieval systems use the inverted file as indexing structure. The inverted file, however, requires inefficient reorganization when new documents are to be added to an existing collection. Most studies suggest dealing with this problem by sparing free space in an inverted file for incremental updates. In this paper, we propose a run-time statistics-based approach to allocate the spare space. This approach estimates the space requirements in an inverted file using only a little most recent statistical data on space usage and document update request rate. For best indexing speed and space efficiency, the amount of the spare space to be allocated is determined by adaptively balancing the trade-offs between reorganization reduction and space utilization. Experiment results show that the proposed space-sparing approach significantly avoids reorganization in updating an inverted file, and in the meantime, unused free space can be well controlled such that the file access speed is not affected. (C) 2003 Elsevier Ltd. All rights reserved.
URI: http://dx.doi.org/10.1016/j.ipm.2003.10.004
http://hdl.handle.net/11536/13941
ISSN: 0306-4573
DOI: 10.1016/j.ipm.2003.10.004
Journal: INFORMATION PROCESSING & MANAGEMENT
Volume: 41
Issue: 2
Begin Page: 275
End Page: 288
Appears in Collections:Articles


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