You are viewing documentation for version 2 of the AWS SDK for Ruby. Version 3 documentation can be found here.

Class: Aws::EMR::Types::SimpleScalingPolicyConfiguration

Inherits:
Struct
  • Object
show all
Defined in:
(unknown)

Overview

Note:

When passing SimpleScalingPolicyConfiguration as input to an Aws::Client method, you can use a vanilla Hash:

{
  adjustment_type: "CHANGE_IN_CAPACITY", # accepts CHANGE_IN_CAPACITY, PERCENT_CHANGE_IN_CAPACITY, EXACT_CAPACITY
  scaling_adjustment: 1, # required
  cool_down: 1,
}

An automatic scaling configuration, which describes how the policy adds or removes instances, the cooldown period, and the number of EC2 instances that will be added each time the CloudWatch metric alarm condition is satisfied.

Returned by:

Instance Attribute Summary collapse

Instance Attribute Details

#adjustment_typeString

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. 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 a decimal. For example, 0.20 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.

Possible values:

  • CHANGE_IN_CAPACITY
  • PERCENT_CHANGE_IN_CAPACITY
  • EXACT_CAPACITY

Returns:

  • (String)

    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.

#cool_downInteger

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:

  • (Integer)

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

#scaling_adjustmentInteger

The amount by which to scale in or scale out, based on the specified AdjustmentType. 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 a decimal. For example, -0.20 indicates a decrease in 20% increments of cluster capacity.

Returns:

  • (Integer)

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