Amazon Elastic Compute Cloud
API Reference (API Version 2016-11-15)


Modifies the specified EC2 Fleet.

While the EC2 Fleet is being modified, it is in the modifying state.

Request Parameters

The following parameters are for this specific action. For more information about required and optional parameters that are common to all actions, see Common Query Parameters.


Checks whether you have the required permissions for the action, without actually making the request, and provides an error response. If you have the required permissions, the error response is DryRunOperation. Otherwise, it is UnauthorizedOperation.

Type: Boolean

Required: No


Indicates whether running instances should be terminated if the total target capacity of the EC2 Fleet is decreased below the current size of the EC2 Fleet.

Type: String

Valid Values: no-termination | termination

Required: No


The ID of the EC2 Fleet.

Type: String

Required: Yes


The size of the EC2 Fleet.

Type: TargetCapacitySpecificationRequest object

Required: Yes

Response Elements

The following elements are returned by the service.


The ID of the request.

Type: String


Is true if the request succeeds, and an error otherwise.

Type: Boolean


For information about the errors that are common to all actions, see Common Client Errors.

See Also

For more information about using this API in one of the language-specific AWS SDKs, see the following: