Reindex is coming!_reindex and _update_by_query are coming to Elasticsearch 2.3.0 and 5.0.0-alpha1! Hurray! _reindex reads documents from one index and writes them to another index. It can be used to copy documents from one index to another, enrich documents with fields, or recreate the index to change settings that are locked when the index is created. _update_by_query reads documents from an index and writes them
ELKで始めるElasticStack6入門 (Elasticsearch, Kibana, Logstash)
