Examkin

Question

Difficulty: MediumAWS Storage Services

A company is hosting a legacy relational database on a single Amazon EC2 instance. The database requires persistent, low-latency, block-level storage that supports frequent random reads and writes, and can be backed up using point-in-time snapshots. Which AWS storage service best meets these requirements?

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

Answer

Amazon Elastic Block Store (Amazon EBS)
Amazon Elastic Block Store (Amazon EBS) is the correct choice because it provides persistent block-level storage that is directly attached to a single EC2 instance, offering the low-latency performance required by transactional databases and support for point-in-time snapshots.

Step-by-Step Solution

1
Analyze the storage requirements of the database workload.
The database needs block-level storage that is persistent, provides low latency, supports a single EC2 instance, and can be backed up using snapshots.
Identifying the workload characteristics helps narrow down the appropriate AWS storage type (object, file, block, or ephemeral).
2
Evaluate the storage type (object vs. file vs. block).
Object storage (S3) is unsuitable for relational database files due to its API-based access. File storage (EFS) is shared network file storage. Block storage (EBS and Instance Store) is appropriate for database drives.
Relational databases require block-level access for performance and transactional integrity.
3
Evaluate durability and persistence requirements.
EC2 Instance Store is ephemeral (data lost on instance stop/termination). Amazon EBS is persistent and supports snapshots.
Since the data must persist after instance stop/termination and support backups, EBS is the correct choice.

Key Concept

Amazon Elastic Block Store (Amazon EBS) provides persistent, low-latency block-level storage volumes for Amazon EC2 instances, suitable for database applications.
Estimated Time:1m 0s
Rate this question

Topics

AWS Storage Services

More questions from this topic