# Initiate a detection alert migration

**POST /api/detection_engine/signals/migration**

Initiate a migration of detection alerts.
Migrations are initiated per index. While the process is neither destructive nor interferes with existing data, it may be resource-intensive. As such, it is recommended that you plan your migrations accordingly.



## Servers
- http://localhost:5601: http://localhost:5601 ()


## Authentication methods
- Basic auth


## Parameters



### Body: application/json (object)
Alerts migration parameters
- **index** (array[string(nonempty)])
  Array of index names to migrate.
- **requests_per_second** (integer)
  The throttle for the migration task in sub-requests per second. Corresponds to requests_per_second on the Reindex API.
- **size** (integer)
  Number of alerts to migrate per batch. Corresponds to the source.size option on the Reindex API.
- **slices** (integer)
  The number of subtasks for the migration task. Corresponds to slices on the Reindex API.


## Responses
### 200
Successful response

#### Body: application/json (object)
- **indices** (array[object])


### 400
Invalid input data response

#### Body: application/json (object)
- **error** (string)

- **message** (string)

- **statusCode** (integer)


### 401
Unsuccessful authentication response

#### Body: application/json (object)
- **error** (string)

- **message** (string)

- **statusCode** (integer)


### 500
Internal server error response

#### Body: application/json (object)
- **message** (string)

- **status_code** (integer)



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