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http://www.apache.org/dyn/closer.cgi/lucene/solr/
Highlights of the Lucene release include:
Added a very substantial (3-5X) RAM reduction required to hold the
terms index on opening an IndexReader. ( LUCENE-2205 )
Added IndexSearcher.searchAfter which returns results after a
specified
http://lucene.apache.org/pylucene/features.html
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Lucene Change Log
Release 3.1.0
Changes in backwards compatibility policy (18)
LUCENE-2719 : Changed API of internal utility class
org.apache.lucene.util.SorterTemplate to support faster quickSort using
pivot values and also merge sort and
http://lucene.apache.org/core/old_versioned_docs/versions/3_1_0/changes/Changes.html
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readers, or use near-real-time reader
(IndexWriter.getReader()), but may introduce invalid search results
(allowing deleted docs to be returned) for certain cases, so a new
expert ctor was added to CachingWrapperFilter to enforce deletions
at a performance cost. CachingSpanFilter by default recaches if
http://lucene.apache.org/core/old_versioned_docs/versions/3_0_3/changes/Changes.html
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()), but may introduce invalid search results
(allowing deleted docs to be returned) for certain cases, so a new
expert ctor was added to CachingWrapperFilter to enforce deletions
at a performance cost. CachingSpanFilter by default recaches if
there are new deletions
(Shay Banon via Mike McCandless
http://lucene.apache.org/core/old_versioned_docs/versions/3_0_2/changes/Changes.html
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,
true /* trackDocScores */,
true /* trackMaxScore */,
false /* docsInOrder */);
searcher.search(query, tfc);
TopDocs results = tfc.topDocs();
Note that your Sort object cannot use
http://lucene.apache.org/core/old_versioned_docs/versions/3_0_1/changes/Changes.html
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/* trackMaxScore */,
false /* docsInOrder */);
searcher.search(query, tfc);
TopDocs results = tfc.topDocs();
Note that your Sort object cannot use SortField.AUTO when you
directly instantiate TopFieldCollector.
Also, the method search(Weight, Filter
http://lucene.apache.org/core/old_versioned_docs/versions/3_0_0/changes/Changes.html
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).
(Uwe Schindler)
LUCENE-2215 : Added IndexSearcher.searchAfter which returns results after a
specified ScoreDoc (e.g. last document on the previous page) to support deep
paging use cases.
(Aaron McCurry, Grant Ingersoll, Robert Muir)
LUCENE-1990 : Adds internal packed ints
http://lucene.apache.org/core/3_6_0/changes/Changes.html
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/DISI), andNot(other/DISI).
(Uwe Schindler)
LUCENE-2215 : Added IndexSearcher.searchAfter which returns results after a
specified ScoreDoc (e.g. last document on the previous page) to support deep
paging use cases.
(Aaron McCurry, Grant Ingersoll, Robert Muir)
LUCENE-1990 : Adds
http://lucene.apache.org/core/old_versioned_docs/versions/3_5_0/changes/Changes.html
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)
LUCENE-3097 : Added a new grouping collector that can be used to retrieve all most relevant
documents per group. This can be useful in situations when one wants to compute grouping
based facets / statistics on the complete query result.
(Martijn van Groningen)
Optimizations (1
http://lucene.apache.org/core/old_versioned_docs/versions/3_4_0/changes/Changes.html
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not store norms.
(Shai Erera, Mike McCandless)
LUCENE-3198 : On Linux, if the JRE is 64 bit and supports unmapping,
FSDirectory.open now defaults to MMapDirectory instead of
NIOFSDirectory since MMapDirectory gives better performance.
(Mike
McCandless)
LUCENE-3200 : MMapDirectory now
http://lucene.apache.org/core/old_versioned_docs/versions/3_3_0/changes/Changes.html