InstanceFleetConfig
The configuration that defines an instance fleet.
Note
The instance fleet configuration is available only in Amazon EMR releases 4.8.0 and later, excluding 5.0.x versions.
Contents
- InstanceFleetType
-
The node type that the instance fleet hosts. Valid values are MASTER, CORE, and TASK.
Type: String
Valid Values:
MASTER | CORE | TASKRequired: Yes
- Context
-
Reserved.
Type: String
Length Constraints: Minimum length of 0. Maximum length of 256.
Pattern:
[\u0020-\uD7FF\uE000-\uFFFD\uD800\uDC00-\uDBFF\uDFFF\r\n\t]*Required: No
- InstanceTypeConfigs
-
The instance type configurations that define the Amazon EC2 instances in the instance fleet.
Type: Array of InstanceTypeConfig objects
Required: No
- LaunchSpecifications
-
The launch specification for the instance fleet.
Type: InstanceFleetProvisioningSpecifications object
Required: No
- Name
-
The friendly name of the instance fleet.
Type: String
Length Constraints: Minimum length of 0. Maximum length of 256.
Pattern:
[\u0020-\uD7FF\uE000-\uFFFD\uD800\uDC00-\uDBFF\uDFFF\r\n\t]*Required: No
- ResizeSpecifications
-
The resize specification for the instance fleet.
Type: InstanceFleetResizingSpecifications object
Required: No
- TargetOnDemandCapacity
-
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, theWeightedCapacityunits 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 aWeightedCapacityof 5 units, the instance is provisioned, and the target capacity is exceeded by 3 units.Note
If not specified or set to 0, only Spot Instances are provisioned for the instance fleet using
TargetSpotCapacity. At least one ofTargetSpotCapacityandTargetOnDemandCapacityshould be greater than 0. For a master instance fleet, only one ofTargetSpotCapacityandTargetOnDemandCapacitycan be specified, and its value must be 1.Type: Integer
Valid Range: Minimum value of 0.
Required: No
- TargetSpotCapacity
-
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, theWeightedCapacityunits 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 aWeightedCapacityof 5 units, the instance is provisioned, and the target capacity is exceeded by 3 units.Note
If not specified or set to 0, only On-Demand Instances are provisioned for the instance fleet. At least one of
TargetSpotCapacityandTargetOnDemandCapacityshould be greater than 0. For a master instance fleet, only one ofTargetSpotCapacityandTargetOnDemandCapacitycan be specified, and its value must be 1.Type: Integer
Valid Range: Minimum value of 0.
Required: No
See Also
For more information about using this API in one of the language-specific AWS SDKs, see the following:
