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Exam AWS Certified Solutions Architect - Professional topic 1 question 402 discussion

Exam question from Amazon's AWS Certified Solutions Architect - Professional
Question #: 402
Topic #: 1
[All AWS Certified Solutions Architect - Professional Questions]

A Solutions Architect is designing the storage layer for a recently purchased application. The application will be running on Amazon EC2 instances and has the following layers and requirements:
✑ Data layer: A POSIX file system shared across many systems.
✑ Service layer: Static file content that requires block storage with more than 100k IOPS.
Which combination of AWS services will meet these needs? (Choose two.)

  • A. Data layer ג€" Amazon S3
  • B. Data layer ג€" Amazon EC2 Ephemeral Storage
  • C. Data layer ג€" Amazon EFS
  • D. Service layer ג€" Amazon EBS volumes with Provisioned IOPS
  • E. Service layer ג€" Amazon EC2 Ephemeral Storage
Show Suggested Answer Hide Answer
Suggested Answer: CE 🗳️
by sb333 at Sept. 17, 2019, 5:26 a.m.
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sb333
Highly Voted 3 years, 8 months ago
Could this be CE? EBS with PIOPS has max of 80,000 IOPS/instance. Ephemeral storage is > 100,000 IOPS/instance. The question doesn't really mention other requirements other than static file content, which doesn't mean durable or temporary. AWS site says Ephemeral Storage is ideal "for data that is replicated across a fleet of instances, such as a load-balanced pool of web servers." Without more specifics, I would think C&E fit the bill of actual requirements of the question. Trying not to think of what I would use personally. https://docs.aws.amazon.com/en_pv/AWSEC2/latest/UserGuide/InstanceStorage.html
upvoted 37 times
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blaubee
Highly Voted 3 years, 8 months ago
C,D Provisioned IOPS has max of 160,000 IOPS/instance. 80,000 IOPS/instance is for previous generation volume type. https://docs.aws.amazon.com/AWSEC2/latest/UserGuide/ebs-volume-types.html https://docs.aws.amazon.com/AWSEC2/latest/UserGuide/ebs-volume-types.html
upvoted 15 times
GopiSivanathan
3 years, 8 months ago
D doesn't seems to be answer for Provisioned IOPS SSD (io2) 16384 : Size (GiB) (Min: 4 GiB, Max: 16384 GiB) IOPS: 64000 (Min: 100 IOPS, Max: 64000 IOPS) Volumes with greater than 32000 IOPS must be attached to a Nitro based instance to achieve p rovisioned performance.
upvoted 2 times
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porlarowl
3 years, 8 months ago
I agree with you. also mentioned EBS volume"s" on D
upvoted 1 times
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WillCloud
3 years, 7 months ago
CE. 1. Only io2 Block Express in Provisioned IOPS SSD can support 100K iops. io1 & io2 can only support up-to 64K iops. https://docs.aws.amazon.com/AWSEC2/latest/UserGuide/ebs-volume-types.html 2. io2 Block Express volumes are supported with R5b instances only. https://docs.aws.amazon.com/AWSEC2/latest/UserGuide/ebs-volume-types.html 3. The new R5b instance is powered by the AWS Nitro System to provide the best network-attached storage performance available on EC2. And the minimum requirement for 100k iops is r5b.12xlarge, which is 48 vCPUs and 384 GiB, too expensive and not realistic for most cases. https://aws.amazon.com/blogs/aws/new-amazon-ec2-r5b-instances-providing-3x-higher-ebs-performance/ 4. Instance store can provide high iops with much lower cost. E.g. i3.2xlarge can provide 180k write IOPS, which has 8 vCPU and 61GiB. https://docs.aws.amazon.com/AWSEC2/latest/UserGuide/storage-optimized-instances.html#i2-instances-diskperf https://aws.amazon.com/ec2/instance-types/i3/
upvoted 5 times
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mrgreatness
Most Recent 2 years, 7 months ago
Answer is c and D. With Ephermal storage ( instance store) the data will be lost if instance stops for example. CD is 100% right answer
upvoted 2 times
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ashii007
2 years, 7 months ago
C,D. Provisioned IOPS can support uto 260K IOPS https://aws.amazon.com/ebs/features/
upvoted 2 times
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mrgreatness
2 years, 7 months ago
It says FIXED storage! Ephermanl will be lost if instance is stopped. C & D for me
upvoted 3 times
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jujumomma
2 years, 8 months ago
C, E C. EFS - POSIX file system ([https://docs.aws.amazon.com/ko_kr/efs/latest/ug/creating-using.html](https://docs.aws.amazon.com/ko_kr/efs/latest/ug/creating-using.html)) D. Amazon EBS volumes with Provisioned IOPS is 64K. ([https://aws.amazon.com/ko/ebs/provisioned-iops/](https://aws.amazon.com/ko/ebs/provisioned-iops/)) E. [https://docs.aws.amazon.com/ko_kr/AWSEC2/latest/UserGuide/storage-optimized-instances.html](https://docs.aws.amazon.com/ko_kr/AWSEC2/latest/UserGuide/storage-optimized-instances.html)
upvoted 1 times
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TechX
2 years, 11 months ago
Selected Answer: CE
Cause the question not mention to be HA, so we could choose C over D. With D, we only have max IOPs 160k with INSTANCE, while with VOLUMN IOPs maximum is 64k
upvoted 3 times
TechX
2 years, 11 months ago
my typo, we could choose E over D*
upvoted 1 times
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jj22222
3 years, 2 months ago
Selected Answer: CE
CE look right
upvoted 2 times
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cldy
3 years, 5 months ago
C and E.
upvoted 1 times
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student22
3 years, 7 months ago
C,E ---
upvoted 2 times
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andylogan
3 years, 7 months ago
It's C E
upvoted 1 times
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AWS_Noob
3 years, 7 months ago
Going forward it might be C & D Block express is GA now and no longer under preview https://aws.amazon.com/about-aws/whats-new/2021/07/aws-announces-general-availability-amazon-ebs-block-express-volumes/
upvoted 3 times
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walkwolf3
3 years, 7 months ago
The original answer is CE, but now D also meets requirement. So the answers are either CD or CE. If it appears in the exam, I will go with CE.
upvoted 3 times
walkwolf3
3 years, 7 months ago
Ephemeral storage https://docs.aws.amazon.com/AWSEC2/latest/UserGuide/storage-optimized-instances.html EBS volume https://docs.aws.amazon.com/AWSEC2/latest/UserGuide/ebs-volume-types.html
upvoted 1 times
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jobe42
3 years, 7 months ago
C and D (IOPS in RAID)
upvoted 1 times
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RichMnz
3 years, 7 months ago
C - Yes. EFS supports Posix, and designed for multiple instances. D? - No. EBS max IOPS is 64k per volume, io2 Block Express is only available in preview. E - Yes. Ephemeral storage is also block storage and meets the IOPS requirement.
upvoted 4 times
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Kopa
3 years, 7 months ago
Im going for CD, i dont understand why should be E while you can choose Provisioned IO2 https://docs.aws.amazon.com/AWSEC2/latest/UserGuide/ebs-volume-types.html
upvoted 3 times
DeathFrmAbv
3 years, 7 months ago
Yup you are correct, io2 Block Express can now go upto 256,000 IOPS https://docs.aws.amazon.com/AWSEC2/latest/UserGuide/ebs-volume-types.html
upvoted 2 times
student2020
3 years, 7 months ago
io2 Block Express is a feature in preview. AWS does not test on features that are still in preview.
upvoted 2 times
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wem
3 years, 7 months ago
I think some of you need to read up on what ephemeral storage is answer is C&D
upvoted 3 times
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