Rafal Kuc is a team leader and software developer. Right now he is a software architect and Solr and Lucene specialist. Mainly focused on Java, but open on every tool and programming language that will make the achievement of his goal easier and faster. Rafal is also one of the founders of solr.pl site where he tries to share his knowledge and help people with their problems. Rafał is a DZone MVB and is not an employee of DZone and has posted 75 posts at DZone. You can read more from them at their website. View Full User Profile

Lucene and Solr 3.3

07.03.2011
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Only a few weeks passed since the release of 3.2 version Lucene and Solr (change list) and today we have another release numbered 3.3. In the newest version there are a few functionalities worth looking at, especially when we talk about Solr.

Changes:

  1. Lucene
    • The spellchecker module now includes autocomplete functionality with three implementations
    • Support for merging results from multiple shards
    • An optimized implementation of KStem library – stemmer for English
    • Improvements to MMapDirectory
    • NRTManager which simplifies handling near real time search with multiple search threads

  2. Solr
    • Field collapsing functionality which allows results grouping
    • KStemFilterFactory – filter factory which allows using optimized version of KStem library
    • The default merge policy used by Solr is now TieredMergePolicy
    • A new, automaton-based, autocomplete implementation
    • Improvements from Apache Lucene 3.3


The full list of changes in Lucene 3.3 can be found here. Solr 3.3 change list can be found here.

The newest version of Lucene library can be found at the following address: http://www.apache.org/dyn/closer.cgi/lucene/java/. The newest version of Solr search engine can be found at the following address: http://www.apache.org/dyn/closer.cgi/lucene/solr/. Please remember that the mirrors are just starting to update so not all of them will contain the 3.3 version of Lucene and Solr.

References
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