AWS Certified Sysops Administrator Associate · Free Practice Question Medium
Question 8
A fleet of Amazon EC2 instances uses a single Amazon Elastic File System (Amazon EFS) through shared usage. An administrator has been asked to track the number of Amazon EC2 instances connected to a file system for a particular time period.
Which EFS metric will help fetch the necessary data?
-
A
Calculate the sum of 'ClientConnections' metric to know the number of instances connected
-
B
Calculate the mean of 'BurstCreditBalance' metric to know the number of instances connected
-
C
Calculate the sum of 'InstanceConnections' metric to know the number of instances connected
-
D
Calculate the average of 'TotalIOBytes' metric to know the number of active connections
Reveal correct answer
Correct answer: A
Explanation
Correct option:
Calculate the sum of 'ClientConnections' metric to know the number of instances connected - To track the number of Amazon EC2 instances that are connected to a file system, you can monitor the Sum statistic of the ClientConnections metric. To calculate the average ClientConnections for periods greater than one minute, divide the sum by the number of minutes in the period.
Incorrect options:
Calculate the average of the 'TotalIOBytes' metric to know the number of active connections - To determine the throughput, you can monitor the daily Sum statistic of the TotalIOBytes metric to see your throughput.
Calculate the mean of the 'BurstCreditBalance' metric to know the number of instances connected - You can see your burst credit balance by monitoring the BurstCreditBalance metric for your file system.
Calculate the sum of 'InstanceConnections' metric to know the number of instances connected - There is no such thing as 'InstanceConnections' metric, this option has been added as a distractor.
Reference:
https://docs.aws.amazon.com/efs/latest/ug/how_to_use_metrics.html
Discussion
Think the marked answer is wrong, or have a better explanation? Share it below — comments appear after review.
