AWS Certified SysOps Administrator – Associate (legacy) — Question 128

You have a proprietary data store on-premises that must be backed up daily by dumping the data store contents to a single compressed 50GB file and sending the file to AWS. Your SLAs state that any dump file backed up within the past 7 days can be retrieved within 2 hours. Your compliance department has stated that all data must be held indefinitely. The time required to restore the data store from a backup is approximately 1 hour. Your on-premise network connection is capable of sustaining 1gbps to AWS.
Which backup methods to AWS would be most cost-effective while still meeting all of your requirements?

Answer options

• A. Send the daily backup files to Glacier immediately after being generated
• B. Transfer the daily backup files to an EBS volume in AWS and take daily snapshots of the volume
• C. Transfer the daily backup files to S3 and use appropriate bucket lifecycle policies to send to Glacier
• D. Host the backup files on a Storage Gateway with Gateway-Cached Volumes and take daily snapshots

Correct answer: C

Explanation

The correct option is C because transferring the backup files to S3 allows for quick access and retrieval within the 2-hour SLA, and using lifecycle policies to transition them to Glacier meets the compliance requirement for indefinite retention at a lower cost. Option A is not ideal since Glacier is designed for infrequent access, and options B and D involve higher costs and complexity without meeting the retention and retrieval requirements as effectively as option C.