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---
mapped_pages:
- https://www.elastic.co/guide/en/elasticsearch/client/curator/current/option_number_of_shards.html
---
# number_of_shards [option_number_of_shards]
::::{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 shards to 2.
options:
shrink_node: DETERMINISTIC
number_of_shards: 2
filters:
- filtertype: ...
```
The value of this setting determines the number of primary shards in the target index. The default value is `1`.
::::{important}
The value for `number_of_shards` must meet the following criteria:
* It must be lower than the number of primary shards in the source index.
* It must be a factor of the number of primary shards in the source index.
::::
|
