Solr is highly reliable, scalable and fault tolerant, providing distributed indexing, replication and load-balanced querying, automated failover and recovery, centralized configuration and more. Solr powers the search and navigation features of many of the world's largest internet sites.
Solr is a standalone enterprise search server with a REST-like API. You put documents in it (called "indexing") via JSON, XML, CSV or binary over HTTP. You query it via HTTP GET and receive JSON, XML, CSV or binary results.
Powered by Lucene, Solr enables powerful matching capabilities including phrases, wildcards, joins, grouping and much more across any data type.
Built on the battle-tested Apache Zookeeper, Solr makes it easy to scale up and down. Solr bakes in replication, distribution, rebalancing and fault tolerance out of the box.
The Apache Software Foundation (ASF) is an American nonprofit corporation organization in the United States to support several open-source software projects. The mission of the ASF is to provide software for the public good.