# Does \_split actually splits data or just copies it across shards

**URL:** https://discuss.elastic.co/t/does-split-actually-splits-data-or-just-copies-it-across-shards/315164
**Category:** Elasticsearch
**Created:** [September 26, 2022, 11:26am UTC](https://discuss.elastic.co/t/does-split-actually-splits-data-or-just-copies-it-across-shards/315164 "2022-09-26T11:26:12Z")
**Posts on this page:** 1
**Showing post:** 3

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### 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: [September 26, 2022, 12:04pm UTC](https://discuss.elastic.co/t/does-split-actually-splits-data-or-just-copies-it-across-shards/315164/3 "2022-09-26T12:04:55Z")

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I would recommend looking at the discusion in this [recent thread](https://discuss.elastic.co/t/how-does-elasticsearch-splitting-an-index-work/313319).

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