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Elastic Block Store Quiz

47,084

An application currently stores all its data on Amazon EBS Volumes. All EBS volumes must be backed up durably across multiple Availability Zones.
What is the MOST resilient way to backup the volumes?

A. Take regular EBS snapshots.

B. Enable EBS volume encryption.

C. Create a script to copy data to an EC2 Instance store.

D. Mirror data across 2 EBS volumes.

A. Take regular EBS snapshots.
Option B is incorrect, because it does not help the durability of EBS Volumes.

Option C is incorrect, since EC2 Instance stores are not durable.

Option D is incorrect, since mirroring data across EBS volumes is inefficient in comparison with the existing option for EBS snapshots.

AWS Documentation mentions the following on AWS EBS Snapshots:

You can back up the data on your Amazon EBS volumes to Amazon S3 by taking point-in-time snapshots. Snapshots are incremental backups, which means that only the blocks on the device that have changed after your most recent snapshot are saved. This minimizes the time required to create the snapshot and saves on storage costs by not duplicating data. When you delete a snapshot, only the data unique to that snapshot is removed. Each snapshot contains all of the information needed to restore your data (from the moment when the snapshot was taken) to a new EBS volume.

For more information on AWS EBS Snapshots, please visit the following URL:

https://docs.aws.amazon.com/AWSEC2/latest/UserGuide/EBSSnapshots.html

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