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From Apache Wiki <>
Subject [Lucene-java Wiki] Update of "ReleaseNote41" by RobertMuir
Date Fri, 26 Oct 2012 01:30:56 GMT
Dear Wiki user,

You have subscribed to a wiki page or wiki category on "Lucene-java Wiki" for change notification.

The "ReleaseNote41" page has been changed by RobertMuir:

first stab

New page:
MMM???? 2012, Apache Luceneā€š 4.1 available
The Lucene PMC is pleased to announce the release of Apache Lucene 4.1

Apache Lucene is a high-performance, full-featured text search engine
library written entirely in Java. It is a technology suitable for nearly
any application that requires full-text search, especially cross-platform.

This release contains numerous bug fixes, optimizations, and
improvements, some of which are highlighted below.  The release
is available for immediate download at:

See the CHANGES.txt file included with the release for a full list of

Lucene 4.1 Release Highlights:

 * Lucene 4.1 has a new default codec (Lucene41Codec) based on the previously-experimental
   "Block" indexing format for improved performance, but also incorporating the functionality
   of "Appending" and "Pulsing".

 * The default codec incorporates the optimization of Pulsing: terms that appear in only one
   document (such as primary key/id fields) just store the document id in the term dictionary
   instead of a pointer to this document id in a separate file.

 * Added CompressingStoredFieldsFormat: an efficient compressed stored fields implementation
   compresses chunks of documents together with LZ4.

 * Lucene no longer seeks when writing files (all fields are written in an append-only way).
   means it works by default with append-only streams, hdfs, etc.

 * Added AnalyzingSuggester, where the underlying analyzed form (computed from a lucene Analyzer)

   used for suggestions is separate from the returned text. 

 * Added FilterStrategy to FilteredQuery for more flexibility in filtered query execution.

 * Several bugfixes and optimizations since the 4.0 release.

Please read CHANGES.txt for a full list of new features.

Please report any feedback to the mailing lists (

Note: The Apache Software Foundation uses an extensive mirroring network for
distributing releases.  It is possible that the mirror you are using may not
have replicated the release yet.  If that is the case, please try another
mirror.  This also goes for Maven access.

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