Request Parameters Response Elements Errors See Also

ModifySpotFleetRequest

Modifies the specified Spot Fleet request.

You can only modify a Spot Fleet request of type maintain.

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

To scale up your Spot Fleet, increase its target capacity. The Spot Fleet launches the additional Spot Instances according to the allocation strategy for the Spot Fleet request. If the allocation strategy is lowestPrice, the Spot Fleet launches instances using the Spot Instance pool with the lowest price. If the allocation strategy is diversified, the Spot Fleet distributes the instances across the Spot Instance pools. If the allocation strategy is capacityOptimized, Spot Fleet launches instances from Spot Instance pools with optimal capacity for the number of instances that are launching.

To scale down your Spot Fleet, decrease its target capacity. First, the Spot Fleet cancels any open requests that exceed the new target capacity. You can request that the Spot Fleet terminate Spot Instances until the size of the fleet no longer exceeds the new target capacity. If the allocation strategy is lowestPrice, the Spot Fleet terminates the instances with the highest price per unit. If the allocation strategy is capacityOptimized, the Spot Fleet terminates the instances in the Spot Instance pools that have the least available Spot Instance capacity. If the allocation strategy is diversified, the Spot Fleet terminates instances across the Spot Instance pools. Alternatively, you can request that the Spot Fleet keep the fleet at its current size, but not replace any Spot Instances that are interrupted or that you terminate manually.

If you are finished with your Spot Fleet for now, but will use it again later, you can set the target capacity to 0.

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.

Context

Reserved.

Type: String

Required: No

ExcessCapacityTerminationPolicy

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

Supported only for fleets of type maintain.

Type: String

Valid Values: noTermination | default

Required: No

LaunchTemplateConfig.N

The launch template and overrides. You can only use this parameter if you specified a launch template (LaunchTemplateConfigs) in your Spot Fleet request. If you specified LaunchSpecifications in your Spot Fleet request, then omit this parameter.

Type: Array of LaunchTemplateConfig objects

Required: No

OnDemandTargetCapacity

The number of On-Demand Instances in the fleet.

Type: Integer

Required: No

SpotFleetRequestId

The ID of the Spot Fleet request.

Type: String

Required: Yes

TargetCapacity

The size of the fleet.

Type: Integer

Required: No

Response Elements

The following elements are returned by the service.

requestId

The ID of the request.

Type: String

return

If the request succeeds, the response returns true. If the request fails, no response is returned, and instead an error message is returned.

Type: Boolean

Errors

For information about the errors that are common to all actions, see Common client error codes.