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Difficulty: MediumResilient and Highly Available Storage Infrastructure

A digital assets platform hosts a collaborative content creation application on Amazon EC2 instances distributed across three Availability Zones. The application requires a shared storage solution that supports concurrent read and write operations from all instances while maintaining high availability and durability. Additionally, the platform must archive finalized media assets. These archived assets must be stored with maximum durability, and the platform must guarantee that any archived asset can be retrieved within a Recovery Time Objective (RTO) of 5 minutes. Which combination of storage solutions meets these requirements?

  1. A
    Use Amazon Elastic File System (Amazon EFS) with the One Zone storage class for the shared application files. Store the archived media assets in Amazon S3 Glacier Flexible Retrieval and utilize Standard retrievals.
  2. B
    Use an Amazon EBS volume with Multi-Attach enabled to share files across all EC2 instances. Store the archived media assets in Amazon S3 Glacier Deep Archive and utilize Standard retrievals.
  3. Use Amazon Elastic File System (Amazon EFS) with the Standard storage class for the shared application files. Store the archived media assets in Amazon S3 Glacier Flexible Retrieval and utilize Expedited retrievals.Answer
  4. D
    Configure each EC2 instance with a local Amazon EBS volume and use a pilot light disaster recovery script to synchronize files between volumes. Store the archived media assets in Amazon S3 Standard and use a lifecycle policy to move them to Amazon S3 Glacier Flexible Retrieval with Bulk retrievals.

Answer

Use Amazon Elastic File System (Amazon EFS) with the Standard storage class for the shared application files, and store the archived media assets in Amazon S3 Glacier Flexible Retrieval utilizing Expedited retrievals.
The correct option provides a highly available, multi-AZ shared file storage solution using Amazon EFS Standard, which allows multiple EC2 instances to read and write concurrently. It also utilizes Amazon S3 Glacier Flexible Retrieval with Expedited retrievals, which typically complete in 1 to 5 minutes, satisfying the 5-minute RTO requirement.

Step-by-Step Solution

1
Evaluate the shared storage requirement for multiple EC2 instances distributed across three Availability Zones.
Identify that Amazon EFS Standard provides a fully managed, shared file system that supports simultaneous read/write access across multiple Availability Zones, whereas EBS Multi-Attach is limited to a single Availability Zone.
To ensure high availability and concurrent access across multiple AZs, EFS Standard is the appropriate choice.
2
Evaluate the recovery time objective (RTO) for retrieving archived media assets.
Identify that Amazon S3 Glacier Flexible Retrieval with Expedited retrievals fulfills the RTO requirement of 5 minutes by retrieving data in 1 to 5 minutes.
Standard and Bulk retrievals, as well as Glacier Deep Archive, have retrieval times ranging from several hours to 12 hours, which fail to meet the 5-minute RTO.

Key Concept

Multi-AZ shared file systems using Amazon EFS and matching S3 Glacier retrieval tiers with strict recovery time objectives.
Estimated Time:1m 30s
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Topics

Resilient and Highly Available Storage Infrastructure

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