EBS

Question 1

What is a baseline consideration for selecting an EC2 instance for use with EBS

Answer 1

Use an EBS optimized instance. hpc6a is, but can only burst up to 30 minutes at least once every 24 hours. These numbers are the same as with hpc6id as well

Question 2

What are SSD volumes better for

Answer 2

SSD volumes handle small or random I/O much more efficiently than HDD volumes. You can maintain high IOPS while keeping latency down by maintaining a low queue length and a high number of IOPS available to the volume.

Question 3

What is the relationship between I/O operations and I/O size

Answer 3

When small I/O operations are physically sequential, Amazon EBS attempts to merge them into a single I/O operation up to the maximum I/O size. Similarly, when I/O operations are larger than the maximum I/O size, Amazon EBS attempts to split them into smaller I/O operations