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Exam AWS Certified SysOps Administrator - Associate topic 1 question 410 discussion

Exam question from Amazon's AWS Certified SysOps Administrator - Associate
Question #: 410
Topic #: 1
[All AWS Certified SysOps Administrator - Associate Questions]

A company has a cluster of Linux Amazon EC2 Spot Instances that read many files from and write many files to attached Amazon Elastic Block Store (Amazon EBS) volumes. The EC2 instances are frequently started and stopped. As part of the process when an EC2 instance starts, an EBS volume is restored from a snapshot.

EBS volumes that are restored from snapshots are experiencing initial performance that is lower than expected. The company's workload needs almost all the provisioned IOPS on the attached EBS volumes. The EC2 instances are unable to support the workload when the performance of the EBS volumes is too low. A SysOps administrator must implement a solution to ensure that the EBS volumes provide the expected performance when they are restored from snapshots.

Which solution will meet these requirements?

  • A. Configure fast snapshot restore (FSR) on the snapshots that are used.
  • B. Restore each snapshot onto an unencrypted EBS volume. Encrypt the EBS volume when the performance stabilizes.
  • C. Format the EBS volumes as XFS file systems before restoring the snapshots.
  • D. Increase the Linux read-ahead buffer to 1 MiB.
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Suggested Answer: A 🗳️
by WinAndWin at Jan. 1, 2024, 3:10 p.m.
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ahmedsamosam
Highly Voted 1 year, 3 months ago
The issue described here is a common one with Amazon EBS volumes restored from snapshots. When an EBS volume is created from a snapshot, the data isn't fully loaded into the volume until it is accessed for the first time. This means that the initial I/O performance of the volume can be lower than expected, which can be problematic for high-performance workloads. To resolve this issue, the most suitable solution would be: A. Configure fast snapshot restore (FSR) on the snapshots that are used: Fast Snapshot Restore (FSR) immediately enables a snapshot's data to be fully realized on the volume, eliminating the need for the lazy loading of data.
upvoted 5 times
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gamebase
Most Recent 1 year, 1 month ago
Selected Answer: A
Fast Snapshot Restore (FSR) will solve this. https://docs.aws.amazon.com/ebs/latest/userguide/ebs-fast-snapshot-restore.html
upvoted 4 times
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stoy123
1 year, 1 month ago
Selected Answer: A
A for sure
upvoted 3 times
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ogogundare
1 year, 3 months ago
C will be a good answer to pre format a volume before using it. This way it improves performance
upvoted 1 times
Aamee
6 months ago
Everytime the snapshot gets restored, we've to format the volume before using it??... how come it can improve the performance?!... and what about the data that it contains, won't it get lost completely with pre-format...
upvoted 1 times
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WinAndWin
1 year, 3 months ago
Selected Answer: A
I think A is correct
upvoted 3 times
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