With all respect to the very smart author of Riemann, as a practical matter, its use of Clojure is simply not a hurdle most SRE types are going to overcome to use it.<p>ElasticSearch is a great search engine. It&#x27;s not a CEP or SEP. I don&#x27;t mean to discourage its use, but for this purpose it&#x27;s not a good fit. It does make sense to tee incoming logs to both as they suit different purposes, but I&#x27;d delegate pattern analysis to the latter.