Have you guys (Team Elastic) been following the development of redis search? I've been watching a number of their presentations for redis enterprise to solve geographically distributed multi-master writes and some of those presentations have touted a large cost savings due to the performance difference between redis and elasticsearch for searching and aggregations purely from the reduced requirements of computing time in the cloud. For large data sets they are using flash storage instead of pure in memory. We aren't specifically interested in redis for search, but as a developer that uses ElasticSearch almost daily, it certainly caught my attention.
I'm not trying to start a flame war between products here, I just wanted to know if there was anything to borrow or steal here if there is any truth to the performance argument.
They are definitely missing a ton of features that ES has and the json based API is much more beginner friendly in my opinion. I feel like it's kind of like ES circa 2011 vs SOLR.