# What is a classic and recommanded ElasticSearch architecture?

**URL:** <https://discuss.elastic.co/t/what-is-a-classic-and-recommanded-elasticsearch-architecture/293727>\
**Category:** Elasticsearch\
**Created:** [January 7, 2022, 10:51am UTC](https://discuss.elastic.co/t/what-is-a-classic-and-recommanded-elasticsearch-architecture/293727 "2022-01-07T10:51:31Z")\
**Posts on this page:** 3\
**Page:** 1

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**Author:** ![sebastienf](https://avatars.discourse-cdn.com/v4/letter/s/f07891/32.png) [@sebastienf](https://discuss.elastic.co/u/sebastienf)\
**Post date:** [January 7, 2022, 10:51am UTC](https://discuss.elastic.co/t/what-is-a-classic-and-recommanded-elasticsearch-architecture/293727/1 "2022-01-07T10:51:31Z")

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Our former cluster ES was made of 40 data nodes.

- 4 of them were coordinators as well
- 3 of them were electable as a master (for one node, it gathers data, coordinator and master-electable role)

We aim to create a new cluster (with 40 nodes as well) and I was wondering if it is recommanded to dedicate to a node, a specific role (ie. a coordinating node does not contain data node, etc.) ?

For example, does a node being both data and coordinator is an anti-pattern ?  
Indeed, on a same node, I presume that a coordinator that falls can impact the data node part ?

Thanks.

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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:** [January 9, 2022, 9:57pm UTC](https://discuss.elastic.co/t/what-is-a-classic-and-recommanded-elasticsearch-architecture/293727/2 "2022-01-09T21:57:25Z")

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Dedicated master nodes should neither store or serve traffic. Beyond that you can have each node doing multiple roles.

It depends on your use case and requirements really.

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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:** [February 6, 2022, 9:57pm UTC](https://discuss.elastic.co/t/what-is-a-classic-and-recommanded-elasticsearch-architecture/293727/3 "2022-02-06T21:57:26Z")

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