# Single Node Clusters and Cluster Status

**URL:** https://discuss.elastic.co/t/single-node-clusters-and-cluster-status/39860
**Category:** Elasticsearch
**Created:** [January 22, 2016, 10:01am UTC](https://discuss.elastic.co/t/single-node-clusters-and-cluster-status/39860 "2016-01-22T10:01:13Z")
**Posts on this page:** 6
**Page:** 1

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### Author: ![dawiro](https://avatars.discourse-cdn.com/v4/letter/d/71e660/32.png) [@dawiro](https://discuss.elastic.co/u/dawiro)
#### Post date: [January 22, 2016, 10:01am UTC](https://discuss.elastic.co/t/single-node-clusters-and-cluster-status/39860/1 "2016-01-22T10:01:13Z")

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Hi,  
I have a test cluster comprised of a single node for performance baselining. I have replicas set to 0 and shard count set to 4. However, as soon as data gets indexed the cluster goes into a yellow state.

is it possible to get cluster health to green when running as a single node?

Regards,  
David

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### Author: ![dadoonet](https://sea2.discourse-cdn.com/elastic/user_avatar/discuss.elastic.co/dadoonet/32/137187_2.png) [@dadoonet](https://discuss.elastic.co/u/dadoonet)
#### Post date: [January 22, 2016, 10:31am UTC](https://discuss.elastic.co/t/single-node-clusters-and-cluster-status/39860/2 "2016-01-22T10:31:58Z")

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It should stay green when number of replicas is 0 for all indices.

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### Author: ![dawiro](https://avatars.discourse-cdn.com/v4/letter/d/71e660/32.png) [@dawiro](https://discuss.elastic.co/u/dawiro)
#### Post date: [January 22, 2016, 11:15am UTC](https://discuss.elastic.co/t/single-node-clusters-and-cluster-status/39860/3 "2016-01-22T11:15:13Z")

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Ok, well it's going yellow when kibana writes its index. The index is getting created with replicas set to 1 how do I change this behaviour?

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### Author: ![dadoonet](https://sea2.discourse-cdn.com/elastic/user_avatar/discuss.elastic.co/dadoonet/32/137187_2.png) [@dadoonet](https://discuss.elastic.co/u/dadoonet)
#### Post date: [January 22, 2016, 12:06pm UTC](https://discuss.elastic.co/t/single-node-clusters-and-cluster-status/39860/4 "2016-01-22T12:06:22Z")

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You can update on a live index the number of replicas

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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 24, 2016, 3:58am UTC](https://discuss.elastic.co/t/single-node-clusters-and-cluster-status/39860/5 "2016-01-24T03:58:01Z")

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`curl -XPUT localhost:9200/*/_settings -d '{ "index" : { "number_of_replicas" : 0 } }'` is what I usually use on my laptop.

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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: [July 5, 2017, 11:22pm UTC](https://discuss.elastic.co/t/single-node-clusters-and-cluster-status/39860/6 "2017-07-05T23:22:09Z")

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