Best Practices for EBS Volumes
Question
Which of the following does AWS perform on its behalf for EBS volumes to make it less prone to failure?
Answers
Explanations
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A. B. C. D.Answer - B.
When you create an EBS volume in an Availability Zone, it is automatically replicated within that zone to prevent data loss due to the failure of any single hardware component.
For more information on EBS Volumes, please refer to the below URL:
https://docs.aws.amazon.com/AWSEC2/latest/UserGuide/EBSVolumes.htmlThe correct answer is A. Replication of the volume across Availability Zones.
Amazon Elastic Block Store (EBS) is a block-level storage service that is used in conjunction with Amazon EC2 instances to provide storage for data. When an EBS volume is created, it is automatically replicated within an Availability Zone to protect against the failure of a single component. This replication is known as EBS volume replication.
An Availability Zone (AZ) is a physically separate data center within a region. Each region has multiple Availability Zones that are interconnected with high-speed, low-latency networking. By replicating EBS volumes across Availability Zones, AWS provides durability and high availability for data storage.
If a hardware failure or other issue occurs in one Availability Zone, EBS can quickly redirect requests to the replicated EBS volume in another Availability Zone, reducing the risk of data loss or downtime.
Option B, replicating the volume in the same Availability Zone, does not provide the same level of protection as replicating across Availability Zones. If a single Availability Zone fails, all data stored within that Availability Zone could be lost.
Option C, replicating the volume across Regions, provides even more protection but can result in higher latency and increased data transfer costs.
Option D, replicating the volume across Edge locations, is not a feature of EBS. Edge locations are part of the Amazon CloudFront content delivery network and are used to cache frequently accessed content to improve performance.
Therefore, option A, replication of the volume across Availability Zones, is the correct answer as it provides high availability and durability for EBS volumes by replicating them across different Availability Zones within a region.
