The difference between Lucene and SOLR

Lucene is an open source full-Text Search engine toolkit, which is not a full-text search engine, but a full-text search engine architecture that provides a complete query engine and indexing engine, some text analysis engine (both English and German Western languages). Lucene's goal is to provide software developers with a simple and easy-to-use toolkit to facilitate full-text retrieval in the target system, or to build a complete full-text search engine on this basis.
SOLR is a high performance, JAVA5 developed, Lucene-based full-text Search server. At the same time, it is extended to provide a richer query language than Lucene, while it can be configured, extensible and optimized for query performance, and provides a perfect function management interface, is a very good full-text search engine. It provides an API interface similar to Web-service. The user can submit a certain format XML file to the Search engine server via HTTP request, generate the index, or make a lookup request via the HTTP SOLR get operation, and get the return result in XML format;
The essential differences between SOLR and Lucene are the following three points: Search server, enterprise level, and management. Lucene is essentially a search library, not a standalone application, while SOLR is. Lucene focuses on the search for the underlying building, while SOLR focuses on enterprise applications. Lucene is not responsible for the management necessary to support the search service, and SOLR is responsible. So, in a nutshell, SOLR:SOLR is the expansion of Lucene for enterprise search applications

The difference between Lucene and SOLR