# Hot and Warm data node architecture

**URL:** <https://discuss.elastic.co/t/hot-and-warm-data-node-architecture/92161>\
**Category:** Elasticsearch\
**Created:** [July 6, 2017, 7:13pm UTC](https://discuss.elastic.co/t/hot-and-warm-data-node-architecture/92161 "2017-07-06T19:13:17Z")\
**Posts on this page:** 5\
**Page:** 1

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**Author:** ![mruthyu](https://avatars.discourse-cdn.com/v4/letter/m/bb73d2/32.png) [@mruthyu](https://discuss.elastic.co/u/mruthyu)\
**Post date:** [July 6, 2017, 7:13pm UTC](https://discuss.elastic.co/t/hot-and-warm-data-node-architecture/92161/1 "2017-07-06T19:13:17Z")

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1. How to identify which indices are part of the hot and warm nodes including the primary and replica?
2. How to tag all the existing indices to the hot data node and make sure none of the indices are in warm node?

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**Author:** ![warkolm](https://sea2.discourse-cdn.com/elastic/user_avatar/discuss.elastic.co/warkolm/32/39224_2.png) [@warkolm](https://discuss.elastic.co/u/warkolm)\
**Post date:** [July 6, 2017, 10:32pm UTC](https://discuss.elastic.co/t/hot-and-warm-data-node-architecture/92161/2 "2017-07-06T22:32:04Z")

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Have a read of [https://www.elastic.co/blog/hot-warm-architecture-in-elasticsearch-5-x](https://www.elastic.co/blog/hot-warm-architecture-in-elasticsearch-5-x) and let us know if that helps 🙂

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**Author:** ![mruthyu](https://avatars.discourse-cdn.com/v4/letter/m/bb73d2/32.png) [@mruthyu](https://discuss.elastic.co/u/mruthyu)\
**Post date:** [July 7, 2017, 4:15am UTC](https://discuss.elastic.co/t/hot-and-warm-data-node-architecture/92161/3 "2017-07-07T04:15:32Z")

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Yes. I have read that article before. 2nd point I can try. How about the 1st?

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**Author:** ![warkolm](https://sea2.discourse-cdn.com/elastic/user_avatar/discuss.elastic.co/warkolm/32/39224_2.png) [@warkolm](https://discuss.elastic.co/u/warkolm)\
**Post date:** [July 7, 2017, 10:22pm UTC](https://discuss.elastic.co/t/hot-and-warm-data-node-architecture/92161/4 "2017-07-07T22:22:32Z")

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Use the `_cat/allocation` API?

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**Author:** ![system](https://us1.discourse-cdn.com/elastic/original/3X/1/a/1ac57faf039f6b580b3f104ef42a2a89e41014de.png) [@system](https://discuss.elastic.co/u/system)\
**Post date:** [August 4, 2017, 10:23pm UTC](https://discuss.elastic.co/t/hot-and-warm-data-node-architecture/92161/5 "2017-08-04T22:23:14Z")

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