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LuceneFAQ - Lucene - Lucene - [wiki]
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... / incorrect hits?
Why am I getting a TooManyClauses exception?
How can I search over multiple fields?
What wildcard search support is available from Lucene?
Can I combine wildcard and phrase...
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... that this can be an expensive operation: it requires scanning the list of tokens in the index in its entirety to look for those that match the pattern.
Can I combine wildcard and phrase search, e...
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[+ show more]
[- hide]
| ...Filter does not affect ranking.
Combine the previous query with the current query using BooleanQuery, using the previous query as required.
The BooleanQuery approach is the recommended one... |
| ... before body matches. But you can also boost queries on title by using query.setBoost(boost) on the relevant clause.
How do I find similar documents?
See the MoreLikeThis class in the org... |
| ....
Questions should only be added to this Wiki page when they already have an answer that can be added at the same time.
Contents
Lucene FAQ
General
How do I start using Lucene?
Are there any... |
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http://wiki.apache.org/lucene-java/LuceneFAQ
Author: SteveRowe,
2011-12-28, 03:22
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HttpAuthenticationSchemes - Nutch - [wiki]
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... credentials is ignored for that host:port combination. Therefore, a catch-all authentication scope to handle all other realms and scopes must be specified explicitly as shown below.
<...
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.../httpclient-auth.xml' file.
Relevant portion from 'logs/hadoop.log' file. If you are clueless, send the complete file.
HttpAuthenticationSchemes...
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[+ show more]
[- hide]
| ... that shows how two sets of credentials have been defined for different authentication scopes. For all pages of example:8080 requiring authentication in the 'blogs' or 'wiki' realm, the first set... |
| ... of credentials would be used.
<credentials username="susam" password="masus">
<authscope host="example" port="8080" realm="blogs"/>
<authscope host="example" port="8080" realm="wiki... |
| ...;credentials username="susam" password="masus">
<authscope host="example" port="8080" realm="blogs"/>
<authscope host="example" port="8080" realm="wiki"/>
</credentials>
<... |
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http://wiki.apache.org/nutch/HttpAuthenticationSchemes
Author: ArkadiKosmynin,
2011-11-30, 05:34
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DistributedWebDB - Nutch - [wiki]
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...FS?, but that's not critical to the algorithm here.)
Having been closed, each WebDBWriter should apply all relevant edits to its partition of the db. At this point, the Writer waits for each of (k-1...
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...DB now exists in k separate pieces. When the distributed WebDBReader needs to examine a certain key, it simply checks the relevant segment first. When asked to enumerate all entries...
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[- hide]
| ... such config value is the place on a local disk where the "root" of the NutchDistributedFileSystem is found. The disk File embodiment of a NutchFile is a combination of that root, the share... |
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http://wiki.apache.org/nutch/DistributedWebDB
Author: LewisJohnMcgibbney,
2011-06-16, 16:00
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SummerOfCode2011ProjectRankingTerrier - Lucene - Lucene - [wiki]
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....
Statistics availability in Lucene
The content of the EntryStatistics class, i.e. the term statistics, is conveniently mirrored by the TermContext class. The relevant fields are
docFreq corresponds...
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... to extend. However, I am not really convinced of the merits of the way idf is handled. I would rather have separate Tf, Idf and Query weight (and maybe Smoothing) parts that could be combined freely...
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http://wiki.apache.org/lucene-java/SummerOfCode2011ProjectRankingTerrier
Author: DavidNemeskey,
2011-06-20, 12:51
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Dimensional Reduction - Apache Mahout - Apache Software Foundation - Mahout - [wiki]
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... a vector over documents where the components are the relevance score), computing co-occurrences in a collaborative filtering context (people who viewed X also viewed Y, or ratings-based CF like...
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... to disk until Mapper close(), and remembering that having a Combiner be the same as the Reducer, the bottleneck in accumulation is nowhere near a single point.
Mahout usage
The Mahout...
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https://cwiki.apache.org/confluence/display/MAHOUT/Dimensional+Reduction
Author: Grant Ingersoll,
2011-11-09, 00:00
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LuceneAtApacheConUs2009 - Lucene - Lucene - [wiki]
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... - Thorsten
Numeric and/or Geo-spatial search with Lucene and Solr - Uwe Schindler
(maybe combine with Grant's new Lucene 2.9 features talk, also maybe coming new things in 3.0 - Java 5 Generics...
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... everywhere, e.g. TokenStream API?)
Intro to Katta - Stefan
Lightning Talks (5 minutes a piece, first come, first served) ? Open Relevance
? Lucene Ports
? Posting-level index pruning...
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[- hide]
| ... ApacheCon wiki.
Meetup attendees
All Lucene users, developers and other interested people are welcome to participate. Please use the sign up form instead of directly editing this list... |
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http://wiki.apache.org/lucene-java/LuceneAtApacheConUs2009
Author: SteveRowe,
2011-02-22, 20:52
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SearchComponent - Solr - [wiki]
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... also provide an autocomplete functionality when used in combination with a Suggester instead of SpellChecker.
QueryElevationComponent -- Used to "elevate" results based on editorial...
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... decisions, not relevance.
TermVectorComponent -- Retrieve Term Vector information. See https://issues.apache.org/jira/browse/SOLR-651 Solr1.4
StatsComponent -- Get Numeric field statistics...
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http://wiki.apache.org/solr/SearchComponent
Author: AndrzejBialecki,
2010-09-27, 20:13
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ConversationsBetweenDougMarvinAndGrant - Lucene - Lucene - [wiki]
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... boosts are not ordered.
Personally I think the eight-bit floats used by Lucene give plenty of
precision for this class of computation. Relevant documents should be
easily distinguished from...
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... non-relevant documents, and fine-differences
in ranking between relevant documents don't matter. The only time folks
have complained about the precision of eight-bit floats in Lucene...
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[- hide]
| ... is
when they've attempted to overload them with other semantics besides
relevance (e.g., dates), which is inappropriate.
So I would opt for delta-encoded positions with a one-byte boost.
I... |
| ... think combining frequencies and positions in a single file might be
useful. If folks don't want to pay the penalty of pawing through
positions then they should disable position indexing... |
| ... a compounded quantization error and we'd be worse
off than we are now.
> I think combining frequencies and positions in a single file might
> be useful. If folks don't want to pay... |
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http://wiki.apache.org/lucene-java/ConversationsBetweenDougMarvinAndGrant
Author: localhost,
2009-09-20, 21:47
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Using relevance scores for psuedo-random-probabilistic ordenation - Solr - [mail # user]
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... Hi, I've just implemented my PseudoRandomFieldComparator (migrated from PseudoRandomComparatorSource). The problem that I see is that I don't have acces to the relevance's scores...
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...Component and then repeat the query or sth similar like reorder my doclist, or if use two diferent components QueryComponent and PseudoComponent (extends from SearchComponent) and look for a good combination. How...
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[- hide]
| ... can I have my relevance scores on my PseudoRandomFieldComparator? Any ideas? Regards, Raimon Bosch. View this message in context: http://www.nabble.com/Using-relevance... |
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Author: Raimon Bosch,
2009-07-08, 14:22
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How to add PageRank score with lucene's relevant score in sorting - Lucene - [mail # user]
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...hi all , I have a problem that how to "combine" two score to sort the search result documents. for example I have 10 million pages in lucene index , and i know their pagerank...
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... scores. i give a query to it , every docs returned have a lucene-score, mark it as R (relevant score), and i also have its pagerank score, mark it as P, what i need is i want to sort...
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Author: 过佳,
2008-05-28, 10:02
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