Which action should the SysOps administrator take to meet these requirements?
Increase the size of the 1 GiB EBS volumes.
Add two additional elastic network interfaces on each EC2 instance.
Turn on Transfer Acceleration on the EBS volumes in the Region.
Add all the EC2 instances to a cluster placement group.
Explanations:
Increasing the size of the EBS volumes from 1 GiB to a larger size (up to 16 TiB for gp2) increases the IOPS capacity of the volumes. For gp2 volumes, the IOPS are calculated based on the size of the volume, providing 3 IOPS per GiB. By increasing the volume size, the total IOPS available will also increase, allowing for better performance without changing instance types or EBS types.
Adding additional elastic network interfaces (ENIs) does not directly impact the IOPS performance of the attached EBS volumes. ENIs are primarily used for network performance and do not influence EBS IOPS capacity.
Transfer Acceleration is not a feature of EBS volumes; it is related to Amazon S3 for accelerating uploads to S3 buckets. It does not apply to improving I/O performance for EBS volumes and therefore would not address the requirement of increasing EBS IOPS.
Cluster placement groups are used to reduce network latency and improve throughput between instances in a cluster. They do not increase the IOPS capacity of EBS volumes. Since the requirement is specifically to enhance EBS I/O performance, this option does not fulfill the criteria.
I opine that the answer is:
Increase the size of the 1 GiB EBS volumes.