AutoScalingPolicy  
    class AutoScalingPolicy
An automatic scaling policy for a core instance group or task instance group in an Amazon EMR cluster. An automatic scaling policy defines how an instance group dynamically adds and terminates Amazon EC2 instances in response to the value of a CloudWatch metric. See PutAutoScalingPolicy.
Types
Properties
Link copied to clipboard
                  The upper and lower Amazon EC2 instance limits for an automatic scaling policy. Automatic scaling activity will not cause an instance group to grow above or below these limits.
Link copied to clipboard
                  The scale-in and scale-out rules that comprise the automatic scaling policy.