[ANNOUNCE] Apache Solr 5.0.0 and Reference Guide for Solr 5.0 released
20 February 2015, Apache Solr™ 5.0.0 and Reference Guide for Solr 5.0
The Lucene PMC is pleased to announce the release of Apache Solr 5.0.0
Solr is the popular, blazing fast, open source NoSQL search platform
from the Apache Lucene project. Its major features include powerful
full-text search, hit highlighting, faceted search, dynamic
clustering, database integration, rich document (e.g., Word, PDF)
handling, and geospatial search. Solr is highly scalable, providing
fault tolerant distributed search and indexing, and powers the search
and navigation features of many of the world's largest internet sites.
See the CHANGES.txt file included with the release for a full list of
Solr 5.0 Release Highlights:
* Usability improvements that include improved bin scripts and new and
* Scripts to support installing and running Solr as a service on Linux.
* Distributed IDF is now supported and can be enabled via the config.
Currently, there are four supported implementations for the same:
* LocalStatsCache: Local document stats.
* ExactStatsCache: One time use aggregation
* ExactSharedStatsCache: Stats shared across requests
* LRUStatsCache: Stats shared in an LRU cache across requests
* Solr will no longer ship a war file and instead be a downloadable
* SolrJ now has first class support for Collections API.
* Implicit registration of replication,get and admin handlers.
* Config API that supports paramsets for easily configuring solr
parameters and configuring fields. This API also supports managing of
pre-existing request handlers and editing common solrconfig.xml via overlay.
* API for managing blobs allows uploading request handler jars and
registering them via config API.
* BALANCESHARDUNIQUE Collection API that allows for even distribution of
custom replica properties.
* There's now an option to not shuffle the nodeSet provided during
* Option to configure bandwidth usage by Replication handler to prevent it
from using up all the bandwidth.
* Splitting of clusterstate to per-collection enables scalability
improvement in SolrCloud. This is also the default format for new
Collections that would be created going forward.
* timeAllowed is now used to prematurely terminate requests during query
expansion and SolrClient request retry.
* pivot.facet results can now include nested stats.field results
constrained by those pivots.
* stats.field can be used to generate stats over the results of arbitrary
It also allows for requesting for statistics for pivot facets using tags.
* A new DateRangeField has been added for indexing date ranges, especially
* Spatial fields that used to require units=degrees now take
distanceUnits=degrees/kilometers miles instead.
* MoreLikeThis query parser allows requesting for documents similar to an
existing document and also works in SolrCloud mode.
* Logging improvements:
* Transaction log replay status is now logged
* Optional logging of slow requests.
Solr 5.0 also includes many other new features as well as numerous
optimizations and bugfixes of the corresponding Apache Lucene release.
Also available is the *Solr Reference Guide for Solr 5.0*. This 535 page
PDF serves as the definitive user's manual for Solr 5.0. It can be
from the Apache mirror network: https://s.apache.org/Solr-Ref-Guide-PDF
Note: The Apache Software Foundation uses an extensive mirroring network
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