Interface CfnInstanceGroupConfig.ISimpleScalingPolicyConfigurationProperty
SimpleScalingPolicyConfiguration
is a subproperty of the ScalingAction
property type.
Namespace: Amazon.CDK.AWS.EMR
Assembly: Amazon.CDK.AWS.EMR.dll
Syntax (csharp)
public interface ISimpleScalingPolicyConfigurationProperty
Syntax (vb)
Public Interface ISimpleScalingPolicyConfigurationProperty
Remarks
SimpleScalingPolicyConfiguration
determines how an automatic scaling action adds or removes instances, the cooldown period, and the number of EC2 instances that are added each time the CloudWatch metric alarm condition is satisfied.
ExampleMetadata: fixture=_generated
Examples
// The code below shows an example of how to instantiate this type.
// The values are placeholders you should change.
using Amazon.CDK.AWS.EMR;
var simpleScalingPolicyConfigurationProperty = new SimpleScalingPolicyConfigurationProperty {
ScalingAdjustment = 123,
// the properties below are optional
AdjustmentType = "adjustmentType",
CoolDown = 123
};
Synopsis
Properties
AdjustmentType | The way in which Amazon EC2 instances are added (if |
CoolDown | The amount of time, in seconds, after a scaling activity completes before any further trigger-related scaling activities can start. |
ScalingAdjustment | The amount by which to scale in or scale out, based on the specified |
Properties
AdjustmentType
The way in which Amazon EC2 instances are added (if ScalingAdjustment
is a positive number) or terminated (if ScalingAdjustment
is a negative number) each time the scaling activity is triggered.
virtual string AdjustmentType { get; }
Property Value
System.String
Remarks
CHANGE_IN_CAPACITY
is the default. CHANGE_IN_CAPACITY
indicates that the Amazon EC2 instance count increments or decrements by ScalingAdjustment
, which should be expressed as an integer. PERCENT_CHANGE_IN_CAPACITY
indicates the instance count increments or decrements by the percentage specified by ScalingAdjustment
, which should be expressed as an integer. For example, 20 indicates an increase in 20% increments of cluster capacity. EXACT_CAPACITY
indicates the scaling activity results in an instance group with the number of Amazon EC2 instances specified by ScalingAdjustment
, which should be expressed as a positive integer.
CoolDown
The amount of time, in seconds, after a scaling activity completes before any further trigger-related scaling activities can start.
virtual Nullable<double> CoolDown { get; }
Property Value
System.Nullable<System.Double>
Remarks
ScalingAdjustment
The amount by which to scale in or scale out, based on the specified AdjustmentType
.
double ScalingAdjustment { get; }
Property Value
System.Double
Remarks
A positive value adds to the instance group's Amazon EC2 instance count while a negative number removes instances. If AdjustmentType
is set to EXACT_CAPACITY
, the number should only be a positive integer. If AdjustmentType
is set to PERCENT_CHANGE_IN_CAPACITY
, the value should express the percentage as an integer. For example, -20 indicates a decrease in 20% increments of cluster capacity.