Apache Lucene and Solr 4.1

Today Apache Lucene and Solr PMC announced another version of Apache Lucene library and Apache Solr search server numbred 4.1. This is a major release both for Apache Lucene and Apache Solr.

Here are some of the changes that were made comparing to the 4.0 version:

Lucene

• Default stored fields compression (http://solr.pl/en/2012/11/19/solr-4-1-stored-fields-compression/)
• New suggester implementation – AnalyzingSuggester
• NRT support for faceting module
• New default codec – Lucene41Codec based on previously experimental block indexing format
• New, pulsing highlighter implementation

Solr

• SolrCloud
  • Allow more than one shard per node (http://solr.pl/en/2013/01/07/solr-4-1-solrcloud-multiple-shards-on-the-same-solr-node/)
  • Performance improvements when query doesn’t need to be sent to other than local shard
  • Allow access to Collections API through CloudSolrServer
  • Enhanced documents routing
  • Support for More Like This in distributed queries
• Solr query parsers can now be invoked in Lucene query syntax using local params
• Additional statistics for request handlers, like 95th and 99th percentile requests time
• Several administration UI improvements
• Changes from Lucene 4.1 including new default codec

Full changes list for Lucene can be found at http://wiki.apache.org/lucene-java/ReleaseNote41. Full list of changes in Solr 4.1 can be found at: http://wiki.apache.org/solr/ReleaseNote41.

Apache Lucene 4.1 library can be downloaded from the following address: http://www.apache.org/dyn/closer.cgi/lucene/java/. Apache Solr 4.1 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 4.1 version of Lucene and Solr.