# Elasticsearch dynamic index **URL:** \ **Category:** Elasticsearch\ **Created:** [July 17, 2017, 3:22pm UTC](https://discuss.elastic.co/t/elasticsearch-dynamic-index/93417 "2017-07-17T15:22:23Z")\ **Posts on this page:** 3\ **Page:** 1
**Author:** ![Adam\_Szabo](https://avatars.discourse-cdn.com/v4/letter/a/67e7ee/32.png) [@Adam\_Szabo](https://discuss.elastic.co/u/Adam_Szabo)\ **Post date:** [July 17, 2017, 3:22pm UTC](https://discuss.elastic.co/t/elasticsearch-dynamic-index/93417/1 "2017-07-17T15:22:23Z")
In [Logstash's Elasticsearch output](https://www.elastic.co/guide/en/logstash/current/plugins-outputs-elasticsearch.html#plugins-outputs-elasticsearch-index) it's possible to define which index should the data be saved in. For time-based data, it's possible to define a date pattern like `logstash-%{+YYYY.MM.dd}`. When an index doesn't exist yet, Elasticsearch will create it. But is it possible to define the mapping somehow? I'd like something like this: **As soon as the index is created, a mapping should be added.** ---
**Author:** ![Christian\_Dahlqvist](https://sea2.discourse-cdn.com/elastic/user_avatar/discuss.elastic.co/christian_dahlqvist/32/4617_2.png) [@Christian\_Dahlqvist](https://discuss.elastic.co/u/Christian_Dahlqvist)\ **Post date:** [July 17, 2017, 3:29pm UTC](https://discuss.elastic.co/t/elasticsearch-dynamic-index/93417/3 "2017-07-17T15:29:05Z")
You do that through [index templates](https://www.elastic.co/guide/en/elasticsearch/reference/5.5/indices-templates.html). ---
**Author:** ![system](https://us1.discourse-cdn.com/elastic/original/3X/1/a/1ac57faf039f6b580b3f104ef42a2a89e41014de.png) [@system](https://discuss.elastic.co/u/system)\ **Post date:** [August 14, 2017, 3:29pm UTC](https://discuss.elastic.co/t/elasticsearch-dynamic-index/93417/4 "2017-08-14T15:29:13Z")
This topic was automatically closed 28 days after the last reply. New replies are no longer allowed.