esfstats - elasticsearch fields statistics
esfstats is a Scala program wrapped in a shell script that runs with Ammonite*. It extracts some statistics re. field coverage in the documents.
*) i.e. you need to install Ammonite at your machine (and maybe Scala and Ivy as well)
esfstats -- -host hostname or IP of the elasticsearch instance -port port of the native Elasticsearch transport protocol API -index index name -type document type -help print this help
-- is required to delegate the parameters to the Scala script (otherwise they will be interpreted as Ammonite parameters)