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.

Link: http://docs.aws.amazon.com/AWSCloudFormation/latest/UserGuide/aws-properties-elasticmapreduce-instancegroupconfig-simplescalingpolicyconfiguration.html

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;

SimpleScalingPolicyConfigurationProperty simpleScalingPolicyConfigurationProperty = new SimpleScalingPolicyConfigurationProperty {
    ScalingAdjustment = 123,

    // the properties below are optional
    AdjustmentType = "adjustmentType",
    CoolDown = 123
};

Synopsis

Properties

AdjustmentType	The way in which 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.
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 `AdjustmentType` .

Properties

AdjustmentType

The way in which 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 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 EC2 instances specified by ScalingAdjustment , which should be expressed as a positive integer.

Link: http://docs.aws.amazon.com/AWSCloudFormation/latest/UserGuide/aws-properties-elasticmapreduce-instancegroupconfig-simplescalingpolicyconfiguration.html#cfn-elasticmapreduce-instancegroupconfig-simplescalingpolicyconfiguration-adjustmenttype

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

The default value is 0.

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 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.