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Difficulty: MediumAWS Storage Services

A financial firm is migrating a compliance application to AWS. The application has two key storage requirements:

1. It needs a persistent block storage volume to host a transactional database run on a single Amazon EC2 instance.
2. It needs a shared file storage solution that can be mounted concurrently by multiple EC2 instances across different Availability Zones to share application configuration files.

Which two AWS storage services should the firm select to meet these requirements? (Select TWO.)

  1. Amazon Elastic Block Store (Amazon EBS)Answer
  2. Amazon Elastic File System (Amazon EFS)Answer
  3. C
    Amazon Simple Storage Service (Amazon S3)
  4. D
    Amazon EC2 Instance Store
  5. E
    Amazon S3 Glacier Flexible Retrieval

Answer

Amazon Elastic Block Store (Amazon EBS) and Amazon Elastic File System (Amazon EFS)
The correct options are Amazon Elastic Block Store (Amazon EBS) and Amazon Elastic File System (Amazon EFS). Amazon EBS offers low-latency, persistent block storage volumes that attach to a single EC2 instance, matching the requirements of transactional databases. Amazon EFS offers a managed, scalable network file system that supports the NFS protocol, allowing multiple EC2 instances to read and write configuration files concurrently across multiple Availability Zones.

Step-by-Step Solution

1
Analyze the first requirement: a persistent block storage volume to host a transactional database on a single EC2 instance.
Identify Amazon EBS as the service designed to provide persistent, low-latency block-level storage volumes for a single EC2 instance.
Transactional databases require high performance block storage, which is the primary use case for Amazon EBS.
2
Analyze the second requirement: a shared file system that can be concurrently mounted by multiple EC2 instances across multiple Availability Zones.
Identify Amazon EFS as the service that provides a serverless network file system supporting concurrent access from multiple EC2 instances.
Unlike block storage, a file system like Amazon EFS supports the Network File System (NFS) protocol for concurrent multi-instance sharing.

Key Concept

Distinguishing between block storage (EBS), file storage (EFS), and object storage (S3) based on application access patterns and persistence requirements.
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Topics

AWS Storage Services

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