Class: AWSCDK::EMR::CfnCluster::SimpleScalingPolicyConfigurationProperty

Inherits:
Jsii::Struct
  • Object
show all
Defined in:
emr/cfn_cluster.rb

Overview

SimpleScalingPolicyConfiguration is a subproperty of the ScalingAction property type.

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.

See Also:

Instance Attribute Summary collapse

Class Method Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(scaling_adjustment:, adjustment_type: nil, cool_down: nil) ⇒ SimpleScalingPolicyConfigurationProperty

Returns a new instance of SimpleScalingPolicyConfigurationProperty.

Parameters:

  • scaling_adjustment (Numeric) —

    The amount by which to scale in or scale out, based on the specified AdjustmentType .

  • adjustment_type (String, nil) (defaults to: nil) —

    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.

  • cool_down (Numeric, nil) (defaults to: nil) —

    The amount of time, in seconds, after a scaling activity completes before any further trigger-related scaling activities can start.



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# File 'emr/cfn_cluster.rb', line 2893

def initialize(scaling_adjustment:, adjustment_type: nil, cool_down: nil)
  @scaling_adjustment = scaling_adjustment
  Jsii::Type.check_type(@scaling_adjustment, JSON.parse(Base64.strict_decode64("eyJwcmltaXRpdmUiOiJudW1iZXIifQ==")), "scalingAdjustment")
  @adjustment_type = adjustment_type
  Jsii::Type.check_type(@adjustment_type, JSON.parse(Base64.strict_decode64("eyJwcmltaXRpdmUiOiJzdHJpbmcifQ==")), "adjustmentType") unless @adjustment_type.nil?
  @cool_down = cool_down
  Jsii::Type.check_type(@cool_down, JSON.parse(Base64.strict_decode64("eyJwcmltaXRpdmUiOiJudW1iZXIifQ==")), "coolDown") unless @cool_down.nil?
end

Instance Attribute Details

#adjustment_type ⇒ String? (readonly)

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.

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.

Returns:

  • (String, nil)

See Also:



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# File 'emr/cfn_cluster.rb', line 2915

def adjustment_type
  @adjustment_type
end

#cool_down ⇒ Numeric? (readonly)

The amount of time, in seconds, after a scaling activity completes before any further trigger-related scaling activities can start.

The default value is 0.

Returns:

  • (Numeric, nil)

See Also:



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# File 'emr/cfn_cluster.rb', line 2922

def cool_down
  @cool_down
end

#scaling_adjustment ⇒ Numeric (readonly)

The amount by which to scale in or scale out, based on the specified AdjustmentType .

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.

Returns:

  • (Numeric)

See Also:



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# File 'emr/cfn_cluster.rb', line 2908

def scaling_adjustment
  @scaling_adjustment
end

Class Method Details

.jsii_properties ⇒ Object 



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# File 'emr/cfn_cluster.rb', line 2924

def self.jsii_properties
  {
    :scaling_adjustment => "scalingAdjustment",
    :adjustment_type => "adjustmentType",
    :cool_down => "coolDown",
  }
end

Instance Method Details

#to_jsii ⇒ Object 



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# File 'emr/cfn_cluster.rb', line 2932

def to_jsii
  result = {}
  result.merge!({
    "scalingAdjustment" => @scaling_adjustment,
    "adjustmentType" => @adjustment_type,
    "coolDown" => @cool_down,
  })
  result.compact
end