# Number of Replicas is always 1 by default
**URL:** https://discuss.elastic.co/t/number-of-replicas-is-always-1-by-default/148064
**Category:** Elasticsearch
**Created:** [September 11, 2018, 6:54am UTC](https://discuss.elastic.co/t/number-of-replicas-is-always-1-by-default/148064 "2018-09-11T06:54:35Z")
**Posts on this page:** 8
**Page:** 1
### Author:  [@cawoodm](https://discuss.elastic.co/u/cawoodm)
#### Post date: [September 11, 2018, 6:54am UTC](https://discuss.elastic.co/t/number-of-replicas-is-always-1-by-default/148064/1 "2018-09-11T06:54:35Z")
All our indices were "yellow" and we discovered it's because the number of replicas was set to 1. When we update the number of replicas to 0 the indexes are green.
Because we periodically re-create our indices and re-index them we added the following to our index creation:
```
{
"index" : {
"number_of_replicas" : 0
},
"mappings": {
"doc": {
"properties": {
...
```
However, such indices are still created with number\_of\_replicas = 1 as is visible in: `GET /_cat/indices`:
```
health status index uuid pri rep docs.count
yellow open logs-test1 ... 5 1 3316531
```
1. Why does ES set 1 by default? Sounds wrong.
2. Why does ES ignore the 0 when we create the index?
---
### Author:  [@shrikantgulia](https://discuss.elastic.co/u/shrikantgulia)
#### Post date: [September 11, 2018, 6:57am UTC](https://discuss.elastic.co/t/number-of-replicas-is-always-1-by-default/148064/2 "2018-09-11T06:57:17Z")
It is because the default is always one
as you are only having one instance thats why the status is yellow
---
### Author:  [@cawoodm](https://discuss.elastic.co/u/cawoodm)
#### Post date: [September 11, 2018, 6:59am UTC](https://discuss.elastic.co/t/number-of-replicas-is-always-1-by-default/148064/3 "2018-09-11T06:59:28Z")
Why is the default 1? =\> Because it is 1. OK, that's cleared that up for us.
---
### Author:  [@Christian\_Dahlqvist](https://discuss.elastic.co/u/Christian_Dahlqvist)
#### Post date: [September 11, 2018, 7:03am UTC](https://discuss.elastic.co/t/number-of-replicas-is-always-1-by-default/148064/4 "2018-09-11T07:03:28Z")
Please show exactly how you create the index.
---
### Author:  [@cawoodm](https://discuss.elastic.co/u/cawoodm)
#### Post date: [September 11, 2018, 8:02am UTC](https://discuss.elastic.co/t/number-of-replicas-is-always-1-by-default/148064/5 "2018-09-11T08:02:42Z")
```
PUT /logs-test1
{
"index" : {
"number_of_replicas" : 0
},
"mappings": {
"doc": {
"properties": {
"category": {"type": "keyword"},
"id": {"type": "long"},
"subcategory": {"type": "keyword"},
"timestamp": {"type": "date","format": "date_time||epoch_millis"},
"type": {"type": "keyword"}
}
}
}
}
```
---
### Author:  [@Christian\_Dahlqvist](https://discuss.elastic.co/u/Christian_Dahlqvist)
#### Post date: [September 11, 2018, 8:09am UTC](https://discuss.elastic.co/t/number-of-replicas-is-always-1-by-default/148064/6 "2018-09-11T08:09:39Z")
You are missing the `settings` level, which is why your settings are not recognised:
```auto
PUT /logs-test1
{
"settings": {
"index" : {
"number_of_replicas" : 0
}
},
"mappings": {
"doc": {
"properties": {
"category": {"type": "keyword"},
"id": {"type": "long"},
"subcategory": {"type": "keyword"},
"timestamp": {"type": "date","format": "date_time||epoch_millis"},
"type": {"type": "keyword"}
}
}
}
}
```
---
### Author:  [@cawoodm](https://discuss.elastic.co/u/cawoodm)
#### Post date: [September 11, 2018, 8:21am UTC](https://discuss.elastic.co/t/number-of-replicas-is-always-1-by-default/148064/7 "2018-09-11T08:21:32Z")
Thanks muchly!
---
### Author:  [@system](https://discuss.elastic.co/u/system)
#### Post date: [October 9, 2018, 8:21am UTC](https://discuss.elastic.co/t/number-of-replicas-is-always-1-by-default/148064/8 "2018-10-09T08:21:35Z")
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