AWS Certified Solutions Architect – Professional (SAP-C02) — Question 301
A company wants to use Amazon S3 to back up its on-premises file storage solution. The company’s on-premises file storage solution supports NFS, and the company wants its new solution to support NFS. The company wants to archive the backup files after 5 days. If the company needs archived files for disaster recovery, the company is willing to wait a few days for the retrieval of those files.
Which solution meets these requirements MOST cost-effectively?
Answer options
- A. Deploy an AWS Storage Gateway file gateway that is associated with an S3 bucket. Move the files from the on-premises file storage solution to the file gateway. Create an S3 Lifecycle rule to move the files to S3 Standard-Infrequent Access (S3 Standard-IA) after 5 days.
- B. Deploy an AWS Storage Gateway volume gateway that is associated with an S3 bucket. Move the files from the on-premises file storage solution to the volume gateway. Create an S3 Lifecycle rule to move the files to S3 Glacier Deep Archive after 5 days.
- C. Deploy an AWS Storage Gateway tape gateway that is associated with an S3 bucket. Move the files from the on-premises file storage solution to the tape gateway. Create an S3 Lifecycle rule to move the files to S3 Standard-Infrequent Access (S3 Standard-IA) after 5 days.
- D. Deploy an AWS Storage Gateway file gateway that is associated with an S3 bucket. Move the files from the on-premises file storage solution to the file gateway. Create an S3 Lifecycle rule to move the files to S3 Glacier Deep Archive after 5 days.
Correct answer: D
Explanation
AWS Storage Gateway file gateway supports the NFS protocol, which is required by the on-premises file storage solution, whereas volume and tape gateways use iSCSI. Transitioning the backup files to S3 Glacier Deep Archive after 5 days is the most cost-effective storage class, and its retrieval time of up to 12 hours easily satisfies the requirement of being able to wait a few days for disaster recovery. Therefore, deploying a file gateway with an S3 Lifecycle rule to S3 Glacier Deep Archive is the most cost-effective and compliant solution.