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Difficulty: MediumAWS Storage Services

A financial institution is deploying a proprietary risk analysis application on a single Amazon EC2 instance. The application requires a dedicated storage volume to serve as its operating system boot drive and to store active database log files that need low-latency, block-level performance. The storage must persist independently of the EC2 instance's lifecycle so that the data is not lost if the instance is stopped or terminated. Which AWS storage service should the institution select to meet these requirements?

  1. A
    Amazon EC2 Instance Store
  2. B
    Amazon Simple Storage Service (Amazon S3)
  3. Amazon Elastic Block Store (Amazon EBS)Answer
  4. D
    Amazon Elastic File System (Amazon EFS)

Answer

Amazon Elastic Block Store (Amazon EBS) is the correct storage service because it provides persistent, block-level storage volumes optimized for low-latency workloads and operating system boot drives attached to a single EC2 instance.
Amazon Elastic Block Store provides persistent, low-latency block-level storage volumes designed for use with Amazon EC2. It satisfies all scenario requirements by serving as a boot drive, delivering block-level performance for active database logs, and retaining data independently of the instance's operational state.

Step-by-Step Solution

1
Analyze the requirements of the application scenario.
The volume must: 1. Serve as a boot drive. 2. Provide low-latency, block-level performance for database logs. 3. Persist independently of the EC2 instance lifecycle (non-ephemeral). 4. Attach to a single EC2 instance.
Identifying these key parameters helps rule out non-block, non-persistent, or shared file systems.
2
Evaluate the storage services based on performance type and persistence.
Object storage (Amazon S3) and shared file storage (Amazon EFS) are ruled out because they are not block storage suitable for boot volumes. Instance Store is block storage but fails the persistence requirement because its data is lost when the instance is stopped.
This leaves Amazon EBS as the only service that satisfies all the criteria.

Key Concept

AWS Storage Types: Object vs. Block vs. File Storage, and Ephemeral vs. Persistent Block Storage
Estimated Time:1m 0s
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Topics

AWS Storage Services

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