The difference between Lucene and SOLR

The difference between Http://androidren.com/index.php?qa=307&qa_1=lucene and SOLR

First, the term lucene is a set of information retrieval toolkit, but does not include the search engine system, it contains the index structure, reading and writing index tools, correlation tools, sorting and other functions. SOLR is a Lucene-based search interface. Provide xml/http and Json/python/ruby APIs, provide search portals, click Highlight, Cache, backup and admin interface. Ii. Differences and linkages Lucene is a class library for searching. SOLR is an application that can be run directly based on Lucene. SOLR is a server of Lucene, embedded with jetty, provides a rest interface, the user can directly post data to SOLR, and then indexed by SOLR. SOLR does not contain the download system and the user is responsible for downloading and transferring the format required to SOLR. Third, reference http://www.cnblogs.com/huangfox/articles/2596768.html

The difference between Lucene and SOLR