Lucene and Solr 4.9

Today Apache Lucene and Solr PMC announced another version of Apache Lucene library and Apache Solr search server numbered 4.9. This is a next release continuing the 4th version of both Apache Lucene and Apache Solr.

Here are some of the changes that were made comparing to the 4.8.1:

Lucene

  • New default format – Lucene49NormsFormat
  • Numerous search time doc values performance improvements
  • New posting format (IDVersionPostingsFormat) optimized for fields holding unique identifiers
  • All Lucene files are now written using OutputStream on all platforms

Solr

  • Support for re-ranking top N query results
  • New doc transformer allowing to include nested documents in results
  • Ability to specify minimal replication factor for an update request
  • Optimizations and bugfixes from Lucene 4.9

Full changes list for Lucene can be found at http://wiki.apache.org/lucene-java/ReleaseNote49. Full list of changes in Solr 4.8 can be found at: http://wiki.apache.org/solr/ReleaseNote49.

Apache Lucene 4.9 library can be downloaded from the following address: http://www.apache.org/dyn/closer.cgi/lucene/java/. Apache Solr 4.9 can be downloaded at the following URL 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 4.9 version of Lucene and Solr.

This entry was posted on Wednesday, June 25th, 2014 at 16:13 and is filed under About Lucene, About Solr. You can follow any responses to this entry through the RSS 2.0 feed. You can leave a response, or trackback from your own site.