Efficient Update of Indexes for Dynamically Changing Web Documents
View/ Open
Issue Date
2007Author
Lim, Lipyeow
Wang, Min
Padmanabhan, Sriram
Vitter, Jeffrey Scott
Agarwal, Ramesh
Publisher
Springer Verlag
Type
Article
Article Version
Scholarly/refereed, author accepted manuscript
Metadata
Show full item recordAbstract
Recent work on incremental crawling has enabled the indexed document collection of a
search engine to be more synchronized with the changing World Wide Web. However, this
synchronized collection is not immediately searchable, because the keyword index is rebuilt
from scratch less frequently than the collection can be refreshed. An inverted index is usually
used to index documents crawled from the web. Complete index rebuild at high frequency is
expensive. Previous work on incremental inverted index updates have been restricted to adding
and removing documents. Updating the inverted index for previously indexed documents that
have changed has not been addressed.
In this paper, we propose an efficient method to update the inverted index for previously
indexed documents whose contents have changed. Our method uses the idea of landmarks
together with the diff algorithm to significantly reduce the number of postings in the inverted
index that need to be updated. Our experiments verify that our landmark-diff method results
in significant savings in the number of update operations on the inverted index.
Description
The original publication is available at www.springerlink.com
Collections
Citation
L. Lim, M. Wang, S. Padmanabhan, J. S. Vitter, and R. Agarwal. “Efficient Update of Indexes for Dynamically Changing Web Documents,” World Wide Web, 10(1), March 2007, 37–69. An extended abstract appears in “Dynamic Maintenance of Web Indexes Using Landmarks,” Proceedings of the 12th International World Wide Web Conference (WWW ’03), Budapest, May 2003, 102–111. http://dx.doi.org/10.1007/s11280-006-0009-2
Items in KU ScholarWorks are protected by copyright, with all rights reserved, unless otherwise indicated.
We want to hear from you! Please share your stories about how Open Access to this item benefits YOU.