Exam AWS Certified SysOps Administrator - Associate All Questions

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Exam AWS Certified SysOps Administrator - Associate topic 1 question 208 discussion

Exam question from Amazon's AWS Certified SysOps Administrator - Associate

Question #: 208
Topic #: 1

[All AWS Certified SysOps Administrator - Associate Questions]

A company runs hundreds of Amazon EC2 instances in a single AWS Region. Each EC2 instance has two attached 1 GiB General Purpose SSD (gp2) Amazon Elastic Block Store (Amazon EBS) volumes. A critical workload is using all the available IOPS capacity on the EBS volumes.

According to company policy, the company cannot change instance types or EBS volume types without completing lengthy acceptance tests to validate that the company’s applications will function properly. A SysOps administrator needs to increase the I/O performance of the EBS volumes as quickly as possible.

Which action should the SysOps administrator take to meet these requirements?

A. Increase the size of the 1 GiB EBS volumes.
B. Add two additional elastic network interfaces on each EC2 instance.
C. Turn on Transfer Acceleration on the EBS volumes in the Region.
D. Add all the EC2 instances to a cluster placement group.

Show Suggested Answer

Suggested Answer: A 🗳️

by michaldavid at Dec. 13, 2022, 12:56 p.m.

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Domdom120

Highly Voted 1 year, 11 months ago

Selected Answer: A

A. 100% positive. "With Amazon EBS Elastic Volumes, you can increase the volume size, change the volume type, or adjust the performance of your EBS volumes. If your instance supports Elastic Volumes, you can do so without detaching the volume or restarting the instance. This enables you to continue using your application while the changes take effect." https://docs.aws.amazon.com/AWSEC2/latest/UserGuide/ebs-modify-volume.html They have Elastic Volumes in place (per the question) and that's exactly why it is specified in the question. As others have mentioned, increasing the volume size increases IOPS, up to the volume type max. For gp2, you can have a volume size of 1 GiB - 16 TiB with a max IOPS of 16,000 for the 16 TiB volume size. https://docs.aws.amazon.com/AWSEC2/latest/UserGuide/ebs-volume-types.html

upvoted 8 times

jipark

1 year, 6 months ago

I don't know why, but "By increasing the size of the EBS volumes, you can effectively increase the IOPS capacity available to your instances. "

upvoted 5 times

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johnson_chao

Most Recent 10 months, 3 weeks ago

Selected Answer: A

Answer is A ref : https://docs.aws.amazon.com/ebs/latest/userguide/general-purpose.html

upvoted 2 times

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Gomer

1 year, 10 months ago

Selected Answer: A

I think A is the correct answer based on the question. However, in the real world, I'd be dubious that changing the volume size (and file system size) would increase IOPS in this case, at least not instantly and maybe not significantly until you actually start writing to the new blocks in a big way. I'd be willing to bet, I/O for existing blocks is going to remain unchained. I'd bet your not going to get instantly greater IOPS just because you resized the volume.

upvoted 1 times

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Vivec

1 year, 11 months ago

Selected Answer: A

The IOPS performance of Amazon EBS volumes is directly proportional to the size of the volume. Therefore, increasing the size of the EBS volumes is the most straightforward way to increase the IOPS performance of the volumes.

upvoted 3 times

Vivec

1 year, 11 months ago

Options B, C, and D are not relevant to the situation described in the question. Adding additional network interfaces, turning on Transfer Acceleration on EBS volumes, or adding EC2 instances to a placement group will not directly improve the I/O performance of the EBS volumes.

upvoted 1 times

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Brokdar

2 years ago

Selected Answer: A

A is correct, since increasing the size of the EBS volume doesn't change the volume type and it will definitely increase the IOPS. B, C and D don't make sense for this question.

upvoted 4 times

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joanneli77

2 years ago

A - I'm not changing EBS volume TYPE, I'm changing EBS volume size. Cluster placement group does not affect IOPS to a local drive on individual instances, but can optimize network communication latency.

upvoted 1 times

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wooyourdaddy

2 years ago

Selected Answer: D

D. Add all the EC2 instances to a cluster placement group. 100% not A: Amazon S3 Transfer Acceleration is a bucket-level feature that enables fast, easy, and secure transfers of files over long distances between your client and an S3 bucket. Transfer Acceleration is designed to optimize transfer speeds from across the world into S3 buckets. Cluster placement groups A cluster placement group is a logical grouping of instances within a single Availability Zone. A cluster placement group can span peered virtual private networks (VPCs) in the same Region. Instances in the same cluster placement group enjoy a higher per-flow throughput limit for TCP/IP traffic and are placed in the same high-bisection bandwidth segment of the network. Ref link: https://docs.aws.amazon.com/AWSEC2/latest/UserGuide/placement-groups.html

upvoted 1 times

wooyourdaddy

2 years ago

100% not A, changing the size or adding size would require changing the config, which would require testing. 100 % not C: A: Amazon S3 Transfer Acceleration is a bucket-level feature that enables fast, easy, and secure transfers of files over long distances between your client and an S3 bucket. Transfer Acceleration is designed to optimize transfer speeds from across the world into S3 buckets.

upvoted 1 times

Brokdar

2 years ago

Increasing the size does not require changing any config, just a partition resize (on Windows) to take advantage of the new size or similar on LVM (on Linux). This doesn't change the EBS volume type, and it will definitely increase the IOPS. So, 100% A.

upvoted 2 times

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Fatoch

2 years, 1 month ago

For me C is correct. Performance should be quick

upvoted 1 times

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skiwili

2 years, 1 month ago

Selected Answer: A

A would be the correct answer

upvoted 3 times

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zolthar_z

2 years, 2 months ago

Answer is A, more capacity = more IOPS

upvoted 3 times

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michaldavid

2 years, 2 months ago

Selected Answer: D

I stand corrected this is D

upvoted 2 times

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beznika

2 years, 2 months ago

I think A is correct. C is for S3 and D doesn't make any sense. Moving instances to placement groups would require acceptance tests. https://docs.aws.amazon.com/AWSEC2/latest/UserGuide/requesting-ebs-volume-modifications.html

upvoted 2 times

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tt79

2 years, 2 months ago

Transfer acceleration is used for uploading data to S3. D is correct.

upvoted 1 times

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michaldavid

2 years, 2 months ago

Selected Answer: C

This is C to me

upvoted 1 times

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