InstanceFleet class

Describes an instance fleet, which is a group of EC2 instances that host a particular node type (master, core, or task) in an Amazon EMR cluster. Instance fleets can consist of a mix of instance types and On-Demand and Spot Instances, which are provisioned to meet a defined target capacity.

Constructors

InstanceFleet({String? id, InstanceFleetType? instanceFleetType, List<InstanceTypeSpecification>? instanceTypeSpecifications, InstanceFleetProvisioningSpecifications? launchSpecifications, String? name, int? provisionedOnDemandCapacity, int? provisionedSpotCapacity, InstanceFleetStatus? status, int? targetOnDemandCapacity, int? targetSpotCapacity})
InstanceFleet.fromJson(Map<String, dynamic> json)
factory

Properties

hashCode → int
The hash code for this object.
no setterinherited
id → String?
The unique identifier of the instance fleet.
final
instanceFleetType → InstanceFleetType?
The node type that the instance fleet hosts. Valid values are MASTER, CORE, or TASK.
final
instanceTypeSpecifications → List<InstanceTypeSpecification>?
The specification for the instance types that comprise an instance fleet. Up to five unique instance specifications may be defined for each instance fleet.
final
launchSpecifications → InstanceFleetProvisioningSpecifications?
Describes the launch specification for an instance fleet.
final
name → String?
A friendly name for the instance fleet.
final
provisionedOnDemandCapacity → int?
The number of On-Demand units that have been provisioned for the instance fleet to fulfill TargetOnDemandCapacity. This provisioned capacity might be less than or greater than TargetOnDemandCapacity.
final
provisionedSpotCapacity → int?
The number of Spot units that have been provisioned for this instance fleet to fulfill TargetSpotCapacity. This provisioned capacity might be less than or greater than TargetSpotCapacity.
final
runtimeType → Type
A representation of the runtime type of the object.
no setterinherited
status → InstanceFleetStatus?
The current status of the instance fleet.
final
targetOnDemandCapacity → int?
The target capacity of On-Demand units for the instance fleet, which determines how many On-Demand Instances to provision. When the instance fleet launches, Amazon EMR tries to provision On-Demand Instances as specified by InstanceTypeConfig. Each instance configuration has a specified WeightedCapacity. When an On-Demand Instance is provisioned, the WeightedCapacity units count toward the target capacity. Amazon EMR provisions instances until the target capacity is totally fulfilled, even if this results in an overage. For example, if there are 2 units remaining to fulfill capacity, and Amazon EMR can only provision an instance with a WeightedCapacity of 5 units, the instance is provisioned, and the target capacity is exceeded by 3 units. You can use InstanceFleet$ProvisionedOnDemandCapacity to determine the Spot capacity units that have been provisioned for the instance fleet.
final
targetSpotCapacity → int?
The target capacity of Spot units for the instance fleet, which determines how many Spot instances to provision. When the instance fleet launches, Amazon EMR tries to provision Spot instances as specified by InstanceTypeConfig. Each instance configuration has a specified WeightedCapacity. When a Spot instance is provisioned, the WeightedCapacity units count toward the target capacity. Amazon EMR provisions instances until the target capacity is totally fulfilled, even if this results in an overage. For example, if there are 2 units remaining to fulfill capacity, and Amazon EMR can only provision an instance with a WeightedCapacity of 5 units, the instance is provisioned, and the target capacity is exceeded by 3 units. You can use InstanceFleet$ProvisionedSpotCapacity to determine the Spot capacity units that have been provisioned for the instance fleet.
final

Methods

noSuchMethod(Invocation invocation) → dynamic
Invoked when a nonexistent method or property is accessed.
inherited
toString() → String
A string representation of this object.
inherited

Operators

operator ==(Object other) → bool
The equality operator.
inherited