不爲也 比不能也

The Ranking Evaluation API that's been added to Elasticsearch is a new, experimental REST API that lets you quickly evaluate the quality of search results for a typical query set. This can be useful either while developing new search queries, incremental improvements of the query templates of an an existing system, or as a basic monitoring tool to detect changes in the search quality of a system..

The most basic form of the search API is the empty search, which doesn’t specify any query but simply returns all documents in all indices in the cluster:search API의 가장 기본적인 형태는, 어떤 query도 지정하지 않은, empty search 이다. cluster에 있는 모든 indices의 모든 document가 반환된다.GET /_searchCOPY AS CURLVIEW IN SENSE The response (edited for brevity) looks something like this:response를 요약하면, 아래와 같다.{ "hits" : { "total"..