Lucene => Solr vs Elasticsearch vs Sphinx

Apache Solr vs Elasticsearch - the Feature Smackdown!
http://solr-vs-elasticsearch.com/

elasticsearch的实时搜索性能为什么比solr好? - 知乎
https://www.zhihu.com/question/41284475

ElasticSearch和Solr，你还傻傻分不清楚吗？ - 云+社区 - 腾讯云
https://cloud.tencent.com/developer/article/1461798

Solr vs Elasticsearch vs Lucene - 数据源博客 - CSDN博客
https://blog.csdn.net/Post_Yuan/article/details/58146656

» ElasticSearch VS. Solr VS. Sphinx：最好的开源搜索引擎比较 Sphinx 中文站
http://www.sphinxsearch.org/archives/492

Elasticsearch与Solr优缺点比较 - 简书
https://www.jianshu.com/p/132b8f1b66a7