Over a million developers have joined DZone.

Lucene and Solr 4.9

· Big Data Zone

Learn how you can maximize big data in the cloud with Apache Hadoop. Download this eBook now. Brought to you in partnership with Hortonworks.

This week 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.

Hortonworks DataFlow is an integrated platform that makes data ingestion fast, easy, and secure. Download the white paper now.  Brought to you in partnership with Hortonworks

Topics:

Published at DZone with permission of Rafał Kuć, DZone MVB. See the original article here.

Opinions expressed by DZone contributors are their own.

The best of DZone straight to your inbox.

SEE AN EXAMPLE
Please provide a valid email address.

Thanks for subscribing!

Awesome! Check your inbox to verify your email so you can start receiving the latest in tech news and resources.
Subscribe

{{ parent.title || parent.header.title}}

{{ parent.tldr }}

{{ parent.urlSource.name }}