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
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
A
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http://docs.aws.amazon.com/autoscaling/latest/userguide/as-instance-monitoring.html
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B. http://docs.aws.amazon.com/AmazonCloudWatch/latest/monitoring/US_SingleMetricPerAMI.html
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A should be better, since this AMI could be used to launch other instances, so the average of the AMI become not that meaningful in this use case.
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A
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