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Difficulty: Very hardResilient and Highly Available Storage Infrastructure

A clinical diagnostics company operates a containerized genomic analysis pipeline on Amazon Elastic Kubernetes Service (Amazon EKS) in the `eu-west-1` Region. The pipeline requires a shared, POSIX-compliant file storage layer that provides latencies of less than 11 millisecond for active DNA sequence processing, supports concurrent read/write access from hundreds of active pods across 33 Availability Zones, and guarantees a Recovery Point Objective (RPO) of 00 and a Recovery Time Objective (RTO) of near 00 in the event of an Availability Zone outage. For compliance, a copy of the processed genomic datasets must be archived in the `eu-central-1` Region with an RPO of less than 1515 minutes. If a disaster occurs in the primary Region, the archived datasets must be accessible in `eu-central-1` within a recovery RTO of 55 minutes. Which combination of storage configurations will meet these resilience and recovery requirements? (Select TWO.)

  1. Configure an Amazon Elastic File System (Amazon EFS) using the Regional (Standard) storage class in the primary Region.Answer
  2. Configure Amazon EFS Replication to asynchronously copy the file system to a destination EFS file system in the secondary Region.Answer
  3. C
    Configure an Amazon EFS One Zone file system in the primary Region and set up a pilot light replication strategy using AWS Backup to copy data to the secondary Region.
  4. D
    Configure the live storage on Amazon S3 Glacier Flexible Retrieval with a Cross-Region Replication (CRR) policy to replicate data to the secondary Region.
  5. E
    Provision Amazon EBS volumes with Multi-Attach enabled across the Availability Zones, and configure an Amazon RDS Read Replica in the secondary Region as the replication target.

Answer

Configure an Amazon Elastic File System (Amazon EFS) using the Regional (Standard) storage class in the primary Region, and configure Amazon EFS Replication to asynchronously copy the file system to a destination EFS file system in the secondary Region.
To build a highly available and resilient shared file system that supports POSIX-compliant operations with sub-millisecond latencies across multiple Availability Zones, the Regional (Standard) storage class of Amazon EFS must be used. To replicate this shared file system to a secondary Region while satisfying an RPO of under 1515 minutes and a recovery RTO of under 55 minutes, Amazon EFS Replication is the native feature that continuously synchronizes data and keeps the destination file system mount-ready.

Step-by-Step Solution

1
Evaluate the primary storage requirements for POSIX compliance, sub-millisecond latencies, and Multi-AZ concurrency.
Identify that Amazon EFS Regional (Standard) storage class is required to allow hundreds of pods to read/write concurrently across 33 Availability Zones.
EFS provides native POSIX-compliant shared file storage with automatic failover and replication across multiple Availability Zones in a Region, ensuring an RPO of 00 and near-zero RTO.
2
Determine the optimal cross-region replication method that satisfies the 1515-minute RPO and 55-minute recovery RTO.
Select Amazon EFS Replication to copy data to a destination EFS file system in the secondary Region.
EFS Replication is a fully managed, native feature that replicates changes asynchronously within minutes (meeting the 1515-minute RPO) and keeps the destination file system ready to mount immediately (meeting the 55-minute recovery RTO).

Key Concept

Amazon EFS Regional storage provides automatic Multi-AZ failover with zero data loss, while Amazon EFS Replication enables managed, low-latency cross-region disaster recovery.
Estimated Time:3m 0s
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Resilient and Highly Available Storage Infrastructure

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