# Eligible H/W specs for master only node in a cluster?

**URL:** <https://discuss.elastic.co/t/eligible-h-w-specs-for-master-only-node-in-a-cluster/232365>\
**Category:** Elasticsearch\
**Created:** [May 13, 2020, 6:08am UTC](https://discuss.elastic.co/t/eligible-h-w-specs-for-master-only-node-in-a-cluster/232365 "2020-05-13T06:08:52Z")\
**Posts on this page:** 2\
**Page:** 1

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**Author:** ![joey-yoonsung](https://avatars.discourse-cdn.com/v4/letter/j/439d5e/32.png) [@joey-yoonsung](https://discuss.elastic.co/u/joey-yoonsung)\
**Post date:** [May 13, 2020, 6:08am UTC](https://discuss.elastic.co/t/eligible-h-w-specs-for-master-only-node-in-a-cluster/232365/1 "2020-05-13T06:08:52Z")

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Hi. I'm going to setup a new elasticsearch cluster like below data and coordinator node spec.

- Broadwell E5-2630 v4 2P10C CPU, 64GB RAM, 4.8TB SSD.

There are 30 nodes for data-node and 3 nodes for coordinator-node.

I want to setup master nodes at least 3 nodes as VM in a Kubernetes environment.

I know the master node doesn't need to high spec because it only manages cluster environment, not performance.

How can I estimate the proper specs for the master nodes of my cluster?( I will struct 3 nodes for master nodes.)

- More nodes in a cluster, do I need more specs for a master node?
- If then, what is the spec that I need for a master node? RAM? CPU? DISK? NIC?
  - Why?

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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:** [June 10, 2020, 6:09am UTC](https://discuss.elastic.co/t/eligible-h-w-specs-for-master-only-node-in-a-cluster/232365/2 "2020-06-10T06:09:01Z")

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