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Lucene and Solr 3.3

· Java Zone

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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.

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