A customer has a single 3-TB volume on-premises that is used to hold a large repository of
images and print layout files. This repository is growing at 500 GB a year and must be
presented as a single logical volume. The customer is becoming increasingly constrained with
their local storage capacity and wants an off-site backup of this data, while maintaining lowlatency access to their frequently accessed data.
Which AWS Storage Gateway configuration meets the customer requirements?
A.
Gateway-Cached volumes with snapshots scheduled to Amazon S3
B.
Gateway-Stored volumes with snapshots scheduled to Amazon S3
C.
Gateway-Virtual Tape Library with snapshots to Amazon S3
D.
Gateway-Virtual Tape Library with snapshots to Amazon Glacier
Explanation:
http://docs.aws.amazon.com/storagegateway/latest/userguide/storage-gateway-cachedconcepts.html
Correct answer is B
B is not correct. Gateway stored volume is On-premise data with scheduled off-site backup.The customer has constraints on data growth every year.
The keyword is “while maintaining low latency access to their frequently accessed data.”
No, it is not B. The question specifically says they’re concerned about the on-premise storage limitations, which means if it were Gateway-Stored, they would’ve needed to have whatever capacity they’re consuming in AWS in their on-prem SAN. Gateway-Cached Volumes, on the other hand, allows them to have only their frequently accessed files (just as required) cached onsite and everything else accessible through the Storage Gateway.
B
Answer is A Cached
Magic word is Frequently accessed
Cached volumes – You store your data in Amazon Simple Storage Service (Amazon S3) and retain a copy of frequently accessed data subsets locally
Stored volumes – If you need low-latency access to your entire dataset