Elasticsearch doesn’t require you to create an index before using it. With logging, it is often more convenient to rely on index autocreation than to have to create indices manually.Elasticsearch는 index를 사용하기 전에, index를 생성할 필요가 없다. 로깅에서는, index 자동 생성이, 수동으로 생성하는 것보다, 더 편리하다.Logstash uses the timestamp from an event to derive the index name. By default, it indexes into a different index every day..