Which solution will meet these requirements?

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In: SOA-C02
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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?

Configure fast snapshot restore (FSR) on the snapshots that are used.

Restore each snapshot onto an unencrypted EBS volume. Encrypt the EBS volume when the performance stabilizes.

Format the EBS volumes as XFS file systems before restoring the snapshots.

Increase the Linux read-ahead buffer to 1 MiB.

Explanations:

Fast Snapshot Restore (FSR) allows EBS snapshots to be restored quickly by pre-provisioning IOPS for the volumes, significantly reducing the time it takes for the volume to reach full performance. This addresses the initial performance issue when volumes are restored from snapshots.

Restoring snapshots onto unencrypted EBS volumes does not inherently improve performance. Encryption and performance are not directly related, and the problem pertains to the initial performance of restored snapshots, not their encryption status.

Formatting EBS volumes as XFS file systems before restoring snapshots does not impact the performance of the EBS volume when it is restored from a snapshot. The performance issue is related to how the snapshots are handled and the provisioned IOPS, not the file system type.

Increasing the Linux read-ahead buffer to 1 MiB may improve performance for read operations, but it does not address the underlying issue of initial performance degradation of EBS volumes restored from snapshots. The problem is with how the IOPS are allocated and utilized during the restore process.

2026-04-05

2 Comments

  1. Emily
    Author

    I systematize that the answer is:
    Configure fast snapshot restore (FSR) on the snapshots that are used.

  2. Joshua
    Author

    I surmise that the answer is:
    Configure fast snapshot restore (FSR) on the snapshots that are used.

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