A company is migrating a high-frequency transactional database to AWS. The database runs o… — AWS Certified Solutions Architect - Associate

A company is migrating a high-frequency transactional database to AWS. The database runs on a single Amazon EC2 instance and requires $45,000$ IOPS with sub-millisecond storage latency. The database currently requires $400$ GB of storage capacity. Which storage configuration should a solutions architect recommend to meet these requirements with the least operational complexity?

A
Provision a single Amazon EBS gp3 volume with $400$ GB capacity and provision $45,000$ IOPS.
Provision a single Amazon EBS io2 volume with $400$ GB capacity and provision $45,000$ IOPS.Answer
C
Provision a single Amazon EBS io1 volume with $400$ GB capacity and provision $45,000$ IOPS.
D
Provision an Amazon Elastic File System (Amazon EFS) file system configured with Provisioned Throughput.

Answer

Provision a single Amazon EBS io2 volume with

400

GB capacity and provision

45,000

IOPS.

Provisioning a single Amazon EBS io2 volume is the optimal solution because io2 (running on io2 Block Express) natively supports sub-millisecond latency and allows configuring up to

1,000

IOPS per GiB. Therefore, a

400

GB volume can easily be provisioned with

45,000

IOPS without needing to stripe volumes or over-provision size.

Step-by-Step Solution

Analyze database storage performance and latency constraints.

The workload requires

45,000

IOPS, sub-millisecond latency, and a starting capacity of

400

GB on a single Amazon EC2 instance.

This establishes the performance boundaries needed to filter out unsupported block and file storage options.

Evaluate EBS volume capabilities and limits against the IOPS-to-capacity requirements.

GP3 volumes are ruled out due to a single-volume limit of

16,000

IOPS. IO1 volumes are ruled out because their

50:1

ratio restricts a

400

GB volume to

20,000

IOPS. IO2 volumes support up to

1000:1

ratio, which accommodates

45,000

IOPS on a

400

GB volume.

Understanding the architectural limits of each EBS volume type prevents improper provisioning and unexpected performance throttling.

Select the storage type that minimizes operational complexity.

A single EBS io2 volume satisfies both the latency and IOPS requirements natively without striping or capacity over-provisioning.

Using a single volume is the simplest configuration to manage and maintain over time.

Key Concept

Amazon EBS Performance Characteristics and Provisioning Ratios

Question

Answer

Step-by-Step Solution

Key Concept

Common Mistakes

Topics

More questions from this topic