Lucene and Solr 6.4

It is a pleasure to inform that the new version, a first release of 2017, of Lucene library and Solr search server has been released. It is another release from the 6.x branch and it is numbered 6.4. Release fixes a few bugs found in the earlier version of Lucene and Solr and brings new functionalities as well.

Example changes in the Lucene library:

  • New similarity called BooleanSimilarity have been introduced that gives terms a score equal to their query boost
  • New token filter called SynonymGraphFilter have been introduced for multi-token query time synonyms and token streams produced by that filter is correctly handled by queries
  • Index sorting is supported on multi-valued fields

Example changes in Solr search engine:

  • Ability to prioritize streaming expressions
  • Command line tool to manage snapshot functionality
  • Key store for SSL can be specified in solr.in.sh file
  • Ability to use the new Unified Highlighter by using hl.method=unified
  • Reworked metrics and introduction of Metrics API
  • Introduction of maxRamMB to control memory consumed by FastLRUCache
  • Introduction of SkipExistingDocumentProcessor for skipping update and indexing of existing documents
  • New configuration flag enable, which allows enabling and disabling of any cache type

Full list of changes can be found at the following URL:  https://wiki.apache.org/lucene-java/ReleaseNote64 and https://lucene.apache.org/solr/6_4_0/changes/Changes.html.

Apache Lucene library 6.4 can be downloaded from: http://www.apache.org/dyn/closer.cgi/lucene/java/. If you want to download Solr search server 6.4 go to http://www.apache.org/dyn/closer.cgi/lucene/solr/.

This entry was posted on Monday, January 23rd, 2017 at 11:05 and is filed under About Lucene, About Solr, Lucene. 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.