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Pools - Enable Pool Auto Scale

Service:
Batch Service
API Version:
2025-06-01

Enables automatic scaling for a Pool.
You cannot enable automatic scaling on a Pool if a resize operation is in progress on the Pool. If automatic scaling of the Pool is currently disabled, you must specify a valid autoscale formula as part of the request. If automatic scaling of the Pool is already enabled, you may specify a new autoscale formula and/or a new evaluation interval. You cannot call this API for the same Pool more than once every 30 seconds.

POST {endpoint}/pools/{poolId}/enableautoscale?api-version=2025-06-01
With optional parameters: 
POST {endpoint}/pools/{poolId}/enableautoscale?api-version=2025-06-01&timeOut={timeOut}

URI Parameters

Name In Required Type Description
endpoint
 path True

string (uri)

Batch account endpoint (for example: https://batchaccount.eastus2.batch.azure.com).
poolId
 path True

string

The ID of the Pool to get.
api-version
 query True

string

minLength: 1

The API version to use for this operation.
timeOut
 query

integer (int32)

The maximum time that the server can spend processing the request, in seconds. The default is 30 seconds. If the value is larger than 30, the default will be used instead.".

Request Header

Media Types: "application/json; odata=minimalmetadata"

Name Required Type Description
client-request-id

string

The caller-generated request identity, in the form of a GUID with no decoration such as curly braces, e.g. 9C4D50EE-2D56-4CD3-8152-34347DC9F2B0.
return-client-request-id

boolean

Whether the server should return the client-request-id in the response.
ocp-date

string (date-time-rfc7231)

The time the request was issued. Client libraries typically set this to the current system clock time; set it explicitly if you are calling the REST API directly.
If-Modified-Since

string (date-time-rfc7231)

A timestamp indicating the last modified time of the resource known to the client. The operation will be performed only if the resource on the service has been modified since the specified time.
If-Unmodified-Since

string (date-time-rfc7231)

A timestamp indicating the last modified time of the resource known to the client. The operation will be performed only if the resource on the service has not been modified since the specified time.
If-Match

string

An ETag value associated with the version of the resource known to the client. The operation will be performed only if the resource's current ETag on the service exactly matches the value specified by the client.
If-None-Match

string

An ETag value associated with the version of the resource known to the client. The operation will be performed only if the resource's current ETag on the service does not match the value specified by the client.

Request Body

Media Types: "application/json; odata=minimalmetadata"

Name Type Description
autoScaleEvaluationInterval

string (duration)

The time interval at which to automatically adjust the Pool size according to the autoscale formula. The default value is 15 minutes. The minimum and maximum value are 5 minutes and 168 hours respectively. If you specify a value less than 5 minutes or greater than 168 hours, the Batch service rejects the request with an invalid property value error; if you are calling the REST API directly, the HTTP status code is 400 (Bad Request). If you specify a new interval, then the existing autoscale evaluation schedule will be stopped and a new autoscale evaluation schedule will be started, with its starting time being the time when this request was issued.
autoScaleFormula

string

The formula for the desired number of Compute Nodes in the Pool. The default value is 15 minutes. The minimum and maximum value are 5 minutes and 168 hours respectively. If you specify a value less than 5 minutes or greater than 168 hours, the Batch service rejects the request with an invalid property value error; if you are calling the REST API directly, the HTTP status code is 400 (Bad Request). If you specify a new interval, then the existing autoscale evaluation schedule will be stopped and a new autoscale evaluation schedule will be started, with its starting time being the time when this request was issued.

Responses

Name Type Description
200 OK

The request has succeeded.

Headers

  • DataServiceId: string
  • ETag: string
  • Last-Modified: string
  • client-request-id: string
  • request-id: string
Other Status Codes

BatchError

An unexpected error response.

Security

OAuth2Auth

Type: oauth2
Flow: implicit
Authorization URL: https://login.microsoftonline.com/common/oauth2/v2.0/authorize

Scopes

Name Description
https://batch.core.windows.net//.default

Examples

Pool enable autoscale

Sample request

POST {endpoint}/pools/poolId/enableautoscale?api-version=2025-06-01



{
  "autoScaleFormula": "$TargetDedicated=0",
  "autoScaleEvaluationInterval": "PT8M"
}

Sample response

Status code:
200

Definitions

Name Description
BatchError

An error response received from the Azure Batch service.
BatchErrorDetail

An item of additional information included in an Azure Batch error response.
BatchErrorMessage

An error message received in an Azure Batch error response.
BatchPoolEnableAutoScaleOptions

Parameters for enabling automatic scaling on an Azure Batch Pool.

BatchError

Object

An error response received from the Azure Batch service.

Name Type Description
code

string

An identifier for the error. Codes are invariant and are intended to be consumed programmatically.
message

BatchErrorMessage

A message describing the error, intended to be suitable for display in a user interface.
values

BatchErrorDetail[]

A collection of key-value pairs containing additional details about the error.

BatchErrorDetail

Object

An item of additional information included in an Azure Batch error response.

Name Type Description
key

string

An identifier specifying the meaning of the Value property.
value

string

The additional information included with the error response.

BatchErrorMessage

Object

An error message received in an Azure Batch error response.

Name Type Description
lang

string

The language code of the error message.
value

string

The text of the message.

BatchPoolEnableAutoScaleOptions

Object

Parameters for enabling automatic scaling on an Azure Batch Pool.

Name Type Description
autoScaleEvaluationInterval

string (duration)

The time interval at which to automatically adjust the Pool size according to the autoscale formula. The default value is 15 minutes. The minimum and maximum value are 5 minutes and 168 hours respectively. If you specify a value less than 5 minutes or greater than 168 hours, the Batch service rejects the request with an invalid property value error; if you are calling the REST API directly, the HTTP status code is 400 (Bad Request). If you specify a new interval, then the existing autoscale evaluation schedule will be stopped and a new autoscale evaluation schedule will be started, with its starting time being the time when this request was issued.
autoScaleFormula

string

The formula for the desired number of Compute Nodes in the Pool. The default value is 15 minutes. The minimum and maximum value are 5 minutes and 168 hours respectively. If you specify a value less than 5 minutes or greater than 168 hours, the Batch service rejects the request with an invalid property value error; if you are calling the REST API directly, the HTTP status code is 400 (Bad Request). If you specify a new interval, then the existing autoscale evaluation schedule will be stopped and a new autoscale evaluation schedule will be started, with its starting time being the time when this request was issued.