Home » Amazon » AWS Certified Solutions Architect - Professional v.2 » Which of the following could not be factor affecting I/O performance of that EBS volume?
A user has configured EBS volume with PIOPS. The user is not experiencing the optimal throughput.
Which of the following could not be factor affecting I/O performance of that EBS volume?
A. EBS bandwidth of dedicated instance exceeding the PIOPS
B. EBS volume size
C. EC2 bandwidth
D. Instance type is not EBS optimized
Correct Answer: B
Explanation/Reference:
If the user is not experiencing the expected IOPS or throughput that is provisioned, ensure that the EC2 bandwidth is not the limiting factor, the instance is EBSoptimized (or include 10 Gigabit network connectivity) and the instance type EBS dedicated bandwidth exceeds the IOPS more than he has provisioned. http:// docs.aws.amazon.com/AWSEC2/latest/UserGuide/ebs-io-characteristics.html
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