# Adaptive replica selection in ES version 8

**URL:** <https://discuss.elastic.co/t/adaptive-replica-selection-in-es-version-8/255277>\
**Category:** Elasticsearch\
**Created:** [November 13, 2020, 2:28am UTC](https://discuss.elastic.co/t/adaptive-replica-selection-in-es-version-8/255277 "2020-11-13T02:28:36Z")\
**Posts on this page:** 3\
**Page:** 1

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**Author:** ![anon17386273](https://avatars.discourse-cdn.com/v4/letter/a/d2c977/32.png) [@anon17386273](https://discuss.elastic.co/u/anon17386273)\
**Post date:** [November 13, 2020, 2:28am UTC](https://discuss.elastic.co/t/adaptive-replica-selection-in-es-version-8/255277/1 "2020-11-13T02:28:36Z")

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Hi

Does anyone know what adaptive replica selection mean?

Below was extracted from  
[https://www.elastic.co/guide/en/elasticsearch/reference/master/breaking-changes-8.0.html](https://www.elastic.co/guide/en/elasticsearch/reference/master/breaking-changes-8.0.html)

> Search and get requests are now routed to shards using adaptive replica selection by default.

**Details**  
Elasticsearch will no longer prefer using shards in the same location (with the same awareness attribute values) to process `_search` and `_get` requests. Adaptive replica selection (activated by default in this version) will route requests more efficiently using the service time of prior inter-node communications.

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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:** [November 13, 2020, 4:12am UTC](https://discuss.elastic.co/t/adaptive-replica-selection-in-es-version-8/255277/2 "2020-11-13T04:12:33Z")

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8.x is not released yet, check out [https://www.elastic.co/guide/en/elasticsearch/reference/current/search-shard-routing.html#search-adaptive-replica](https://www.elastic.co/guide/en/elasticsearch/reference/current/search-shard-routing.html#search-adaptive-replica) instead.

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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:** [December 11, 2020, 4:12am UTC](https://discuss.elastic.co/t/adaptive-replica-selection-in-es-version-8/255277/3 "2020-12-11T04:12:38Z")

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