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Difficulty: EasyHigh-Performing and Scalable Storage Solutions

An organization runs a content management system (CMS) on a cluster of Amazon EC2 instances distributed across three Availability Zones. The CMS requires a shared storage solution that supports POSIX-compliant file system operations, allows concurrent read-and-write access from all instances, and automatically scales throughput as storage needs grow. Which two AWS storage configurations should a solutions architect select to meet these requirements? (Select TWO.)

  1. Create an Amazon Elastic File System (Amazon EFS) file system.Answer
  2. Configure EFS mount targets in the subnets of each Availability Zone where the EC2 instances are running.Answer
  3. C
    Provision an Amazon EBS gp3 volume and enable the Multi-Attach feature to share it across the EC2 instances.
  4. D
    Deploy an Amazon EBS io2 Block Express volume and attach it to all EC2 instances across the three Availability Zones.
  5. E
    Create an Amazon S3 bucket and use AWS Storage Gateway Volume Gateway in cached mode to mount the storage locally on the instances.

Answer

Create an Amazon Elastic File System (Amazon EFS) file system and configure EFS mount targets in the subnets of each Availability Zone where the EC2 instances are running.
The correct architecture uses Amazon EFS, which provides a serverless network file system that supports simultaneous connections from EC2 instances in multiple Availability Zones. By placing EFS mount targets in the subnets of each Availability Zone where the instances reside, those instances can concurrently mount the file system over the network using standard NFS protocols.

Step-by-Step Solution

1
Identify the storage access requirements.
The workload requires concurrent read-and-write access to a shared file system (POSIX-compliant) from instances spanning three Availability Zones.
Since Amazon EBS volumes are restricted to a single Availability Zone, a shared file system solution like Amazon EFS is needed.
2
Select the appropriate storage service.
Choose Amazon EFS, which is designed for shared, scalable, POSIX-compliant network file system (NFS) access.
Amazon EFS natively supports multi-AZ mounting and dynamically scales throughput and capacity.
3
Configure network connectivity for the file system.
Create EFS mount targets in the subnets of each Availability Zone containing the EC2 instances.
Instances mount the EFS file system using the local mount target IP address in their respective Availability Zones.

Key Concept

Amazon EFS provides concurrent, POSIX-compliant shared file storage across multiple Availability Zones via Mount Targets.
Estimated Time:50s
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High-Performing and Scalable Storage Solutions

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