Often, users start using Elasticsearch because they need to add full-text search or analytics to an existing application. They create a single index that holds all of their documents. Gradually, others in the company realize how much benefit Elasticsearch brings, and they want to add their data to Elasticsearch as well.흔히, 사용자가 기존의 응용프로그램에 full-text 검색이나 분석 기능을 추가해야 하는 경우, Elasticsearch 사용을 시작한다..