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Posted to dev@mahout.apache.org by Grant Ingersoll <gs...@apache.org> on 2009/09/25 19:09:08 UTC
Fwd: The Release of Lucene 2.9
Now we can move off of the Lucene SNAPSHOT version included in Mahout
onto an official release.
Begin forwarded message:
> From: Mark Miller <ma...@gmail.com>
> Date: September 25, 2009 12:08:09 PM EDT
> To: general@lucene.apache.org, "java-dev@lucene.apache.org" <java-dev@lucene.apache.org
> >, java-user@lucene.apache.org, announce@apache.org
> Subject: The Release of Lucene 2.9
> Reply-To: java-user@lucene.apache.org
> Reply-To: markrmiller@apache.org
>
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>
> Hello Lucene users,
>
> On behalf of the Lucene dev community (a growing community far larger
> than just the committers) I would like to announce the release of
> Lucene 2.9.
>
> While we generally try and maintain full backwards compatibility
> between major versions, Lucene 2.9 has a variety of breaks that are
> spelled out in the 'Changes in backwards compatibility policy' section
> of CHANGES.txt.
>
> We recommend that you recompile your application with Lucene 2.9
> rather than attempting to “drop” it in. This will alert you to any
> issues you may have to fix if you are affected by one of the backward
> compatibility breaks. As always, its a really good idea to thoroughly
> read CHANGES.txt before upgrading.
>
> Lucene 2.9 comes with a bevy of new features, including:
>
> * Per segment searching and caching (can lead to much faster reopen
> among other things)
>
> * Near real-time search capabilities added to IndexWriter
>
> * New Query types
>
> * Smarter, more scalable multi-term queries (wildcard, range, etc)
>
> * A freshly optimized Collector/Scorer API
>
> * Improved Unicode support and the addition of Collation contrib
>
> * A new Attribute based TokenStream API
>
> * A new QueryParser framework in contrib with a core QueryParser
> replacement impl included.
>
> * Scoring is now optional when sorting by Field, or using a custom
> Collector, gaining sizable performance when scores are not
> required.
>
> * New analyzers (PersianAnalyzer, ArabicAnalyzer,
> SmartChineseAnalyzer)
>
> * New fast-vector-highlighter for large documents
>
> * Lucene now includes high-performance handling of numeric fields.
> Such fields are indexed with a trie structure, enabling simple to
> use and much faster numeric range searching without having to
> externally pre-process numeric values into textual values.
>
> ---
>
> And many, many more features, bug fixes, optimizations, and various
> improvements. You can find the full list of changes here:
>
> http://lucene.apache.org/java/2_9_0/changes/Changes.html
>
>
> Many changes have also occurred in Lucene's Contrib area:
>
> http://lucene.apache.org/java/2_9_0/changes/Contrib-Changes.html
>
>
> Binary and source distributions are available at
> http://www.apache.org/dyn/closer.cgi/lucene/java/
>
> Lucene artifacts are also available in the Maven2 repository at
> http://repo1.maven.org/maven2/org/apache/lucene/
>
> The Next Release:
>
> The next release will be Lucene 3.0. This should come along shortly,
> and will
> remove all of the deprecated code in Lucene 2.9. Lucene 3.0 will also
> be the
> first release to move from Java 1.4 to Java 1.5 as a requirement.
>
>
> Thanks,
>
> Mark Miller
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--------------------------
Grant Ingersoll
http://www.lucidimagination.com/
Search the Lucene ecosystem (Lucene/Solr/Nutch/Mahout/Tika/Droids)
using Solr/Lucene:
http://www.lucidimagination.com/search
Re: Fwd: The Release of Lucene 2.9
Posted by Isabel Drost <is...@apache.org>.
On Friday 25 September 2009 19:09:08 Grant Ingersoll wrote:
> Now we can move off of the Lucene SNAPSHOT version included in Mahout
> onto an official release.
Great. Congratulations. And just in time for the talk on Lucene 2.9 by Uwe
Schindler in Berlin next week.
Isabel
--
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gone away.
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