# `IlmShrinkAction` [interface-IlmShrinkAction]

| Name | Type | Description |
| - | - | - |
| `allow_write_after_shrink` | boolean |   |
| `max_primary_shard_size` | [ByteSize](./ByteSize.md) |   |
| `number_of_shards` | [integer](./integer.md) |   |