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Difficulty: HardResilient and Highly Available Storage Infrastructure

An IoT-connected vehicle telemetry platform processes real-time diagnostics data using Amazon EC2 instances distributed across three Availability Zones. The application requires a shared file storage layer that supports POSIX-compliant file operations, concurrent access from all EC2 instances, and sub-millisecond latencies. Additionally, the business requires a disaster recovery (DR) solution in a secondary AWS Region with a Recovery Point Objective (RPO) of 15 minutes and a Recovery Time Objective (RTO) of 5 minutes. Which combination of storage configurations will meet these requirements? (Select TWO).

  1. Create an Amazon Elastic File System (Amazon EFS) file system using the Standard storage class and configure mount targets in each Availability Zone.Answer
  2. Configure Amazon EFS Replication to replicate the file system to a destination Amazon EFS file system in the secondary AWS Region.Answer
  3. C
    Provision an Amazon EBS volume with Multi-Attach enabled, using the gp3 volume type to share the volume among all EC2 instances across the Availability Zones.
  4. D
    Configure the shared file storage on Amazon S3 Glacier Flexible Retrieval and set up Cross-Region Replication (CRR) to replicate the data to the secondary AWS Region.
  5. E
    Deploy an Amazon RDS Multi-AZ DB cluster with read replicas in the secondary AWS Region and write the telemetry files directly to the read replica for cross-region disaster recovery.

Answer

Creating an Amazon EFS file system with the Standard storage class across multiple Availability Zones combined with Amazon EFS Replication to a secondary AWS Region.
The combination of deploying Amazon EFS with the Standard storage class and configuring EFS Replication meets all requirements. Amazon EFS provides the necessary POSIX compliance and allows concurrent access from EC2 instances in multiple Availability Zones. Configuring EFS Replication to a secondary region replicates data within minutes, fulfilling the 15-minute RPO, and the destination file system is instantly mountable, satisfying the 5-minute RTO.

Step-by-Step Solution

1
Select a shared file system that supports POSIX compliance and concurrent access across multiple Availability Zones.
Choose Amazon Elastic File System (Amazon EFS) with the Standard storage class.
Amazon EFS Standard is designed for Multi-AZ deployments and supports concurrent access from EC2 instances across multiple Availability Zones with low latency, unlike EBS volumes which are locked to a single AZ.
2
Choose a replication mechanism that achieves a low Recovery Point Objective (RPO) and Recovery Time Objective (RTO) in a secondary AWS Region.
Enable Amazon EFS Replication to a destination file system in the secondary AWS Region.
Amazon EFS Replication replicates data asynchronously to a secondary region, achieving an RPO of minutes and an RTO of minutes since the destination file system is already active and ready to mount.

Key Concept

Multi-AZ shared file storage with low latency combined with sub-minute regional replication.
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Topics

Resilient and Highly Available Storage Infrastructure

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