Practice Test 3 | AWS Certified Solutions Architect Associate | SAA-C03 | Dumps | Mock Test

Answer – A

Gateway-cached volumes let you use Amazon Simple Storage Service (Amazon S3) as your primary data storage while retaining frequently accessed data locally in your storage gateway. Gateway-cached volumes minimize the need to scale your on-premises storage infrastructure, while still providing your applications with low-latency access to their frequently accessed data. You can create storage volumes up to 32 TiB in size and attach to them as iSCSI devices from your on-premises application servers. Your gateway stores data that you write to these volumes in Amazon S3 and retains recently read data in your on-premises storage gateway’s cache and upload buffer storage.

For more information on Storage Gateways, please visit the link:

• http://docs.aws.amazon.com/storagegateway/latest/userguide/storage-gateway-cached-concepts.html

Note: 

The two requirements of the question are low latency access to frequently accessed data and an offsite back up of the data.

• Option A is correct because your primary data is written to S3 while retaining your frequently accessed data locally in a cache for low-latency access.
• Option B is incorrect because it is storing the primary data locally (but we have a storage constraint hence this is not a viable solution) and your entire dataset is available for low-latency access while asynchronously backed up to AWS.
• Options C & D are incorrect it cannot provide low latency access to frequently accessed data.