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How can the user achieve this?

A user has launched 10 instances from the same AMI ID using Auto Scaling. The user is trying to see the average CPU utilization across all instances of the last 2 weeks under the CloudWatch console.

How can the user achieve this?
A . View the Auto Scaling CPU metrics
B . Aggregate the data over the instance AMI ID
C . The user has to use the CloudWatchanalyser to find the average data across instances
D . It is not possible to see the average CPU utilization of the same AMI ID since the instance ID is different

Answer: A

Explanation:

You can aggregate statistics for the EC2 instances in an Auto Scaling group. Note that Amazon CloudWatch cannot aggregate data across regions. Metrics are completely separate between regions.

http://docs.aws.amazon.com/AmazonCloudWatch/latest/monitoring/GetMetricAutoScalingGroup.html

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