This is comprehensive look at the two from an author of 2 ES books and 1 Solr book. http://blog.sematext.com/2012/08/23/solr-vs-elasticsearch-part-1-overview/ h

This is comprehensive look at the two from an author of 2 ES books and 1 Solr book. http://blog.sematext.com/2012/08/23/solr-vs-elasticsearch-part-1-overview/ http://blog.sematext.com/2012/08/23/solr-vs-elasticsearch-pa... Chance some ES stuff might be a touch out of date as Elasticsearch has evolved a lot since this was written.