Amazon Elastic MapReduce
API Reference (API Version 2009-03-31)

AutoScalingPolicyDescription

An automatic scaling policy for a core instance group or task instance group in an Amazon EMR cluster. The automatic scaling policy defines how an instance group dynamically adds and terminates EC2 instances in response to the value of a CloudWatch metric. See PutAutoScalingPolicy.

Contents

Constraints

The upper and lower EC2 instance limits for an automatic scaling policy. Automatic scaling activity will not cause an instance group to grow above or below these limits.

Type: ScalingConstraints object

Required: No

Rules

The scale-in and scale-out rules that comprise the automatic scaling policy.

Type: Array of ScalingRule objects

Required: No

Status

The status of an automatic scaling policy.

Type: AutoScalingPolicyStatus object

Required: No

See Also

For more information about using this API in one of the language-specific AWS SDKs, see the following:

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