AWS Certified Solutions Architect – Professional (SAP-C02) — Question 440

A company is deploying a new web-based application and needs a storage solution for the Linux application servers. The company wants to create a single location for updates to application data for all instances. The active dataset will be up to 100 GB in size. A solutions architect has determined that peak operations will occur for 3 hours daily and will require a total of 225 MiBps of read throughput.

The solutions architect must design a Multi-AZ solution that makes a copy of the data available in another AWS Region for disaster recovery (DR). The DR copy has an RPO of less than 1 hour.

Which solution will meet these requirements?

Answer options

• A. Deploy a new Amazon Elastic File System (Amazon EFS) Multi-AZ file system. Configure the file system for 75 MiBps of provisioned throughput. Implement replication to a file system in the DR Region.
• B. Deploy a new Amazon FSx for Lustre file system. Configure Bursting Throughput mode for the file system. Use AWS Backup to back up the file system to the DR Region.
• C. Deploy a General Purpose SSD (gp3) Amazon Elastic Block Store (Amazon EBS) volume with 225 MiBps of throughput. Enable Multi-Attach for the EBS volume. Use AWS Elastic Disaster Recovery to replicate the EBS volume to the DR Region.
• D. Deploy an Amazon FSx for OpenZFS file system in both the production Region and the DR Region. Create an AWS DataSync scheduled task to replicate the data from the production file system to the DR file system every 10 minutes.

Correct answer: A

Explanation

Amazon EFS is a shared, Multi-AZ file system designed for Linux instances that supports native cross-region replication with an RPO of minutes, satisfying the DR requirement. For EFS Provisioned Throughput, read operations are allocated up to 3 times the provisioned throughput rate, meaning 75 MiBps of provisioned throughput successfully delivers the required 225 MiBps of read throughput. Other options either do not natively support Multi-AZ shared storage for Linux web servers (such as EBS gp3 Multi-Attach) or introduce unnecessary complexity and cost compared to EFS.