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Lucene and Solr 3.4

Today, we can enjoy another version of Lucene and Solr – release numbered 3.4. In the newest version there are a few functionalities worth looking at.

Changes:

  1. Lucene
    • Fixes a bug that could lead to index corruption in case of hardware failure
    • Added faceting module (contrib/facet)
    • Added join module that enables to index and query for nested documents (contrib/join)
    • Added multi-word synonym filter that can be used while indexing and searching
  2. Solr
    • When using results grouping, facetingcan now be applied per group
    • You can now use NIOFSDirectory
    • queryCache and filterCache can be now disabled per request
    • SynonymFilter performance and memory usage was improved
    • Using hl.phraseLimit improves FastVectorHighlighting performance
    • Bug fixes and improvements from Lucene 3.4

The full list of changes in Lucene 3.4 can be found here. Solr 3.4 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 3.4 version of Lucene and Solr.

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