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Exam AWS Certified Solutions Architect - Associate SAA-C02 topic 1 question 757 discussion

Exam question from Amazon's AWS Certified Solutions Architect - Associate SAA-C02
Question #: 757
Topic #: 1
[All AWS Certified Solutions Architect - Associate SAA-C02 Questions]

A company is planning to build a high performance computing (HPC) workload as a service solution that is hosted on AWS. A group of 16 Amazon EC2 Linux instances requires the lowest possible latency for node-to-node communication. The instances also need a shared block device volume for high-performing storage.
Which solution will meet these requirements?

  • A. Use a cluster placement group. Attach a single Provisioned IOPS SSD Amazon Elastic Block Store (Amazon EBS) volume to all the instances by using Amazon EBS Multi-Attach.
  • B. Use a cluster placement group. Create shared file systems across the instances by using Amazon Elastic File System (Amazon EFS).
  • C. Use a partition placement group. Create shared file systems across the instances by using Amazon Elastic File System (Amazon EFS).
  • D. Use a spread placement group. Attach a single Provisioned IOPS SSD Amazon Elastic Block Store (Amazon EBS) volume to all the instances by using Amazon EBS Multi-Attach.
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Suggested Answer: A 🗳️
by LeonTH at Sept. 28, 2022, 8:51 a.m.
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Ruby_Song
2 years, 4 months ago
Answer should be A. 1. lowest possible latency + node to node ==> cluster placement(must be within one AZ), so C, D out 2. For EBS Multi-Attach, up to 16 instances can be attached to a single volume==>we have 16 linux instance==>more close to A 3. "need a shared block device volume"==>EBS Multi-attach is Block Storage whereas EFS is File Storage==> B out 4. EFS automatically replicates data within and across 3 AZ==>we use cluster placement so all EC2 are within one AZ. 5. EBS Multi-attach volumes can be used for clients within a single AZ. https://repost.aws/questions/QUK2RANw1QTKCwpDUwCCI72A/efs-vs-ebs-mult-attach
upvoted 3 times
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Alexander_Nox
2 years, 7 months ago
Selected Answer: A
Answer is A, EBS
upvoted 2 times
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sundubu
2 years, 7 months ago
Selected Answer: B
For shared block device volume, It must be EFS not EBS
upvoted 2 times
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LeonTH
2 years, 7 months ago
Selected Answer: A
The answer is A: https://docs.aws.amazon.com/AWSEC2/latest/UserGuide/ebs-volumes-multi.html
upvoted 3 times
Jobair
2 years, 5 months ago
you are right, you can attach up to 16 Linux instances
upvoted 1 times
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LeonTH
2 years, 7 months ago
The answer is A: https://docs.aws.amazon.com/AWSEC2/latest/UserGuide/ebs-volumes-multi.html
upvoted 4 times
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