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---
mapped_pages:
- https://www.elastic.co/guide/en/elasticsearch/client/curator/current/option_number_of_replicas.html
---
# number_of_replicas [option_number_of_replicas]
::::{note}
This setting is only used by the [shrink](/reference/shrink.md) action.
::::
```yaml
action: shrink
description: >-
Shrink selected indices on the node with the most available space.
Set the number of replicas to 0.
options:
shrink_node: DETERMINISTIC
number_of_replicas: 0
filters:
- filtertype: ...
```
The value of this setting determines the number of replica shards per primary shard in the target index. The default value is `1`.
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