superkelvint/solr-vs-elasticsearch — pull request #3 by piskvorky (2013-04-18 16:19:33+00:00)
Title: point out a long-standing, critical ES bug

Faceting is "checked" for ElasticSearch, while in reality it only works for trivial cases (indexes with a single shard).

IMO worth mentioning that ES is not suitable for apps that require accurate facet counts.