Exam AWS Certified Solutions Architect - Associate SAA-C03 topic 1 question 465 discussion

Multi-Attach is supported exclusively on Provisioned IOPS SSD (io1 and io2) volumes.

hdd<gp2<gp3<io2

A follow-up as to why this is a terrible question - the application could either have throughput or IOPS as its weakest link. In a real-world meeting with the designer team, I would tell them that until you provide real numbers under load in UAT you are going to get gp3 as a best all-around solution.

This is a terribly written question - there is no benchmark specifications for either IOPS or throughput. Because of this if you guess anything other than gp3 you would be guessing incorrectly. In real-life without such specifications, you would choose gp3. Terrible question.

AWS IO2 does support Multi-Attach. Multi-Attach allows you to share access to an EBS data volume between up to 16 Nitro-based EC2 instances within the same Availability Zone. Each attached instance has full read and write permission to the shared volume. This feature is intended to make it easier to achieve higher application availability for customers that want to deploy applications that manage storage consistency from multiple writers in shared storage infrastructure. However, please note that Multi-Attach on io2 is available in certain regions only.

C. Use Provisioned IOPS SSD (io2) EBS volumes with Amazon Elastic Block Store (Amazon EBS) Multi-Attach

Multi-Attach is supported exclusively on Provisioned IOPS SSD (io1 and io2) volumes. https://docs.aws.amazon.com/AWSEC2/latest/UserGuide/ebs-volumes-multi.html#:~:text=Multi%2DAttach%20is%20supported%20exclusively%20on%20Provisioned%20IOPS%20SSD%20(io1%20and%20io2)%20volumes.

Multi-Attach is supported exclusively on Provisioned IOPS SSD (io1 and io2) volumes. https://docs.aws.amazon.com/AWSEC2/latest/UserGuide/ebs-volumes-multi.html

The correct answer is A. Currently, Multi Attach EBS feature is supported by gp3 volumes also. Multi-Attach is supported for certain EBS volume types, including io1, io2, gp3, st1, and sc1 volumes.

Answer should be D

By ChatGPT - Create General Purpose SSD (gp2) volumes: Provision multiple gp2 volumes with the required capacity for your application.

Multi-Attach does not support Provisioned IOPS SSD (io2) volumes. Multi-Attach is currently available only for General Purpose SSD (gp2), Throughput Optimized HDD (st1), and Cold HDD (sc1) EBS volumes.

Multi-Attach is supported exclusively on Provisioned IOPS SSD (io1 or io2) volumes.

only io1/io2 supports Multi-Attach

only io1/io2 supports Multi-Attach

Option D suggests using General Purpose SSD (gp2) EBS volumes with Amazon EBS Multi-Attach. While gp2 volumes support multi-attach, gp3 volumes offer a more cost-effective solution with enhanced performance characteristics.

Answer - C C. Use Provisioned IOPS SSD (io2) EBS volumes with Amazon Elastic Block Store (Amazon EBS) Multi-Attach. While both option C and option D can support Amazon EBS Multi-Attach, using Provisioned IOPS SSD (io2) EBS volumes provides higher performance and lower latency compared to General Purpose SSD (gp2) volumes. This makes io2 volumes better suited for demanding and mission-critical applications where performance is crucial. If the goal is to achieve higher application availability and ensure optimal performance, using Provisioned IOPS SSD (io2) EBS volumes with Multi-Attach will provide the best results.