[ https://issues.apache.org/jira/browse/LUCENE-2230?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]
Fuad Efendi updated LUCENE-2230: -------------------------------- Attachment: FuzzyTermEnumNEW.java FuzzyTermEnumNEW.java In order to use it with Lucene 2.9.1, complie all files (4 files) in a separate JAR file (Java 6). In a source distribution of Lucene 2.9.1, modify FuzzyQuery, single method: protected FilteredTermEnum getEnum(IndexReader reader) throws IOException { return new FuzzyTermEnumNEW(reader, getTerm(), minimumSimilarity, prefixLength); } - and complie it (using default settings such as Java 1.4 compatibility); "ant jar-core" will do it. Use 2 new jars instead of lucene-core-2.9.1.jar > Lucene Fuzzy Search: BK-Tree can improve performance 3-20 times. > ---------------------------------------------------------------- > > Key: LUCENE-2230 > URL: https://issues.apache.org/jira/browse/LUCENE-2230 > Project: Lucene - Java > Issue Type: Improvement > Affects Versions: 3.0 > Environment: Lucene currently uses brute force full-terms scanner and > calculates distance for each term. New BKTree structure improves performance > in average 20 times when distance is 1, and 3 times when distance is 3. I > tested with index size several millions docs, and 250,000 terms. > New algo uses integer distances between objects. > Reporter: Fuad Efendi > Attachments: BKTree.java, Distance.java, DistanceImpl.java, > FuzzyTermEnumNEW.java > > Original Estimate: 0.02h > Remaining Estimate: 0.02h > > W. Burkhard and R. Keller. Some approaches to best-match file searching, > CACM, 1973 > http://portal.acm.org/citation.cfm?doid=362003.362025 > I was inspired by > http://blog.notdot.net/2007/4/Damn-Cool-Algorithms-Part-1-BK-Trees (Nick > Johnson, Google). > Additionally, simplified algorythm at > http://www.catalysoft.com/articles/StrikeAMatch.html seems to be much more > logically correct than Levenstein distance, and it is 3-5 times faster > (isolated tests). > Big list od distance implementations: > http://www.dcs.shef.ac.uk/~sam/stringmetrics.htm -- This message is automatically generated by JIRA. - You can reply to this email to add a comment to the issue online. --------------------------------------------------------------------- To unsubscribe, e-mail: java-dev-unsubscr...@lucene.apache.org For additional commands, e-mail: java-dev-h...@lucene.apache.org