Questions 52 to 54

Explanations for questions 52 to 54

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Question 52

A solutions architect is designing the disk configuration for an Amazon EC2 instance. The instance needs to support a MapReduce process that requires high throughput for a large dataset with large I/O sizes.

Which Amazon EBS volume is the most cost-effective solution for these requirements?

  1. EBS General Purpose SSD in a RAID 1 configuration
  2. EBS Throughput Optimized HDD
  3. EBS Provisioned IOPS SSD
  4. EBS General Purpose SSD

Correct Answer: 2

Explanation: EBS Throughput Optimized HDD is good for the following use cases (and is the most cost-effective option):

  • Frequently accessed, throughput intensive workloads with large datasets and large I/O sizes, such as MapReduce, Kafka, log processing, data warehouse, and ETL workloads

Throughput is measured in MB/s and includes the ability to burst up to 250 MB/s per TB, with a baseline throughput of 40 MB/s per TB and a maximum throughput of 500 MB/s per volume.

INCORRECT: “EBS General Purpose SSD in a RAID 1 configuration” is incorrect. This is neither the best solution considering the requirements nor the most cost effective.

CORRECT: “EBS Throughput Optimized HDD” is the correct answer.

INCORRECT: “EBS Provisioned IOPS SSD” is incorrect. SSD disks are more expensive.

INCORRECT: “EBS General Purpose SSD” is incorrect. SSD disks are more expensive.

References: https://docs.aws.amazon.com/AWSEC2/latest/UserGuide/ebs-volume-types.html

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