Here’s a table summarizing the major versions of Apache Solr, a popular open-source search platform, and highlighting a major feature or improvement introduced with each version:
| Version | Release Date | Major Feature or Improvement |
|---|---|---|
| Solr 1.2 | May 2007 | Faceted Search added, improving search capabilities. |
| Solr 1.3 | September 2008 | Introduction of distributed search capabilities. |
| Solr 1.4 | October 2009 | Rich document parsing (PDF, Word), and enhanced indexing speed. |
| Solr 3.1 | March 2011 | Performance enhancements and extended plugin architecture. |
| Solr 4.0 | October 2012 | SolrCloud for distributed configurations and real-time indexing. |
| Solr 5.0 | February 2015 | Moved to standalone server, eliminating the need for a separate servlet container. |
| Solr 6.0 | April 2016 | Parallel SQL interface for relational-style queries. |
| Solr 7.0 | September 2017 | Major advancements in the Lucene library and simplified cluster management. |
| Solr 8.0 | February 2019 | Enhanced security features and metrics reporting improvements. |
| Solr 9.0 | 2021 | Removal of deprecated features, and Java 11+ requirement. |
Each version brought significant improvements to enhance search capabilities, manageability, scalability, and performance, making Solr a robust choice for enterprise search solutions.
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