# Changing the shard size
**URL:** https://discuss.elastic.co/t/changing-the-shard-size/267359
**Category:** Elasticsearch
**Created:** [March 16, 2021, 11:40am UTC](https://discuss.elastic.co/t/changing-the-shard-size/267359 "2021-03-16T11:40:36Z")
**Posts on this page:** 9
**Page:** 1
### Author:  [@sagar\_rao](https://discuss.elastic.co/u/sagar_rao)
#### Post date: [March 16, 2021, 11:40am UTC](https://discuss.elastic.co/t/changing-the-shard-size/267359/1 "2021-03-16T11:40:37Z")
Hi,
I have Aws elastic search cluster with two nodes. The data is being pushed from fluentd to elastic search. By default all the indexs have 5 primary shards and 1 replica. And i want to resize the no of primary shards to 2 for the new indexes. "I know i can use shrunk api for older indices"
Where can i do this. Indices are created by fluentd itself.
---
### Author:  [@dadoonet](https://discuss.elastic.co/u/dadoonet)
#### Post date: [March 16, 2021, 1:21pm UTC](https://discuss.elastic.co/t/changing-the-shard-size/267359/2 "2021-03-16T13:21:06Z")
> [@sagar\_rao](#):
>
> By default all the indexs have 5 primary shards and 1 replica. And i want to resize the no of primary shards to 2 for the new indexes
I don't think you can reduce a 5 shards index to 2 shards. You would need to reindex instead in a new index.
But you can reduce to 1 shard I think. Here is a typical script to do that on an index `INDEX` in a cluster which has a node with name `NODE1`:
```auto
# Read only and move primaries to one single node and no replica
PUT /INDEX/_settings
{
"settings": {
"index.number_of_replicas": 0,
"index.routing.allocation.require._name": "NODE1",
"index.blocks.write": true
}
}
# Check shards allocation
GET /_cat/shards/INDEX*?v&h=index,shard,prirep,state,docs,node
# Shrink the index
POST /INDEX/_shrink/INDEX_shrunk
{
"settings": {
"index.routing.allocation.require._name": null,
"index.blocks.write": null,
"index.number_of_replicas": 1,
"index.number_of_shards": 1
}
}
```
> [@sagar\_rao](#):
>
> Where can i do this. Indices are created by fluentd itself.
Check the fluentd documentation. May be you need to change an index template...
> [@sagar\_rao](#):
>
> I have Aws Elasticsearch cluster with two nodes.
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---
### Author:  [@sagar\_rao](https://discuss.elastic.co/u/sagar_rao)
#### Post date: [March 17, 2021, 5:32am UTC](https://discuss.elastic.co/t/changing-the-shard-size/267359/3 "2021-03-17T05:32:49Z")
Hey Thank you for the reply
I dont want to change shard count for previous indexes . I only want to chnage the or restrict primary shard count to 2 for the new indexes which are going to come in. Is there a way to do that from elastic side. Or it should be done from fluentd end? Note: Fluentd is creating the index as the data coming into it.
---
### Author:  [@Christian\_Dahlqvist](https://discuss.elastic.co/u/Christian_Dahlqvist)
#### Post date: [March 17, 2021, 5:55am UTC](https://discuss.elastic.co/t/changing-the-shard-size/267359/4 "2021-03-17T05:55:03Z")
You do that through an index template that matches the index names created by fluentd.
---
### Author:  [@sagar\_rao](https://discuss.elastic.co/u/sagar_rao)
#### Post date: [March 17, 2021, 8:17am UTC](https://discuss.elastic.co/t/changing-the-shard-size/267359/5 "2021-03-17T08:17:08Z")
How can i change the default value of shards in the cluster settings?
---
### Author:  [@Christian\_Dahlqvist](https://discuss.elastic.co/u/Christian_Dahlqvist)
#### Post date: [March 17, 2021, 8:18am UTC](https://discuss.elastic.co/t/changing-the-shard-size/267359/6 "2021-03-17T08:18:55Z")
You need to use [index templates](https://www.elastic.co/guide/en/elasticsearch/reference/7.11/indices-put-template.html).
---
### Author:  [@sagar\_rao](https://discuss.elastic.co/u/sagar_rao)
#### Post date: [March 18, 2021, 9:57am UTC](https://discuss.elastic.co/t/changing-the-shard-size/267359/7 "2021-03-18T09:57:49Z")
I used this index template
PUT \_template/template\_1
{
"index\_patterns": ["te\*", "bar\*"],
"settings": {
"number\_of\_shards": 1
},
"mappings": {
"\_source": {
"enabled": false
},
"properties": {
"host\_name": {
"type": "keyword"
},
"created\_at": {
"type": "date",
"format": "EEE MMM dd HH:mm:ss Z yyyy"
}
}
}
}
Now my indexes are not showing all the fields. should i also add fields to this index template.
If thats the case i cant some fields come in dynamically sometimes.
---
### Author:  [@dadoonet](https://discuss.elastic.co/u/dadoonet)
#### Post date: [March 18, 2021, 12:48pm UTC](https://discuss.elastic.co/t/changing-the-shard-size/267359/8 "2021-03-18T12:48:16Z")
Why did you disable the source field?
---
### Author:  [@system](https://discuss.elastic.co/u/system)
#### Post date: [April 15, 2021, 12:48pm UTC](https://discuss.elastic.co/t/changing-the-shard-size/267359/9 "2021-04-15T12:48:54Z")
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