Efficient Update of Indexes for Dynamically Changing Web Documents Export

@article{citeulike:1228633, abstract = {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.}, address = {Hingham, MA, USA}, author = {Lim, Lipyeow and Wang, Min and Padmanabhan, Sriram and Vitter, Jeffrey S. and Agarwal, Ramesh}, citeulike-article-id = {1228633}, citeulike-linkout-0 = {http://portal.acm.org/citation.cfm?id=1231490}, citeulike-linkout-1 = {http://dx.doi.org/10.1007/s11280-006-0009-2}, citeulike-linkout-2 = {http://www.ingentaconnect.com/content/klu/wwwj/2007/00000010/00000001/00000009}, doi = {10.1007/s11280-006-0009-2}, issn = {1386-145X}, journal = {World Wide Web}, keywords = {2007, inverted-index, search, www}, month = {March}, number = {1}, pages = {37--69}, posted-at = {2009-10-01 07:24:42}, priority = {4}, publisher = {Kluwer Academic Publishers}, title = {Efficient Update of Indexes for Dynamically Changing Web Documents}, url = {http://dx.doi.org/10.1007/s11280-006-0009-2}, volume = {10}, year = {2007} }

TY - JOUR ID - citeulike:1228633 L3 - citeulike-article-id:1228633 N2 - 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. IS - 1 JF - World Wide Web SN - 1386-145X AD - Hingham, MA, USA EP - 69 TI - Efficient Update of Indexes for Dynamically Changing Web Documents PB - Kluwer Academic Publishers VL - 10 SP - 37 KW - 2007 KW - inverted-index KW - search KW - www AU - Lim, Lipyeow AU - Wang, Min AU - Padmanabhan, Sriram AU - Vitter, Jeffrey AU - Agarwal, Ramesh PY - 2007/03// UR - http://dx.doi.org/10.1007/s11280-006-0009-2 ER -