Question 21
Domain 3: Resilient Cloud SolutionsA company is migrating its product development teams from an on-premises data center to a hybrid environment. The new environment will add four AWS Regions and will give the developers the ability to use the Region that is geographically closest to them. All the development teams use a shared set of Linux applications. The on-premises data center stores the applications on a NetApp ONTAP storage device. The storage volume is mounted read-only on the development on-premises VMs. The company updates the applications on the shared volume once a week. A DevOps engineer needs to replicate the data to all the new Regions. The DevOps engineer must ensure that the data is always up to date with deduplication. The data also must not be dependent on the availability of the on-premises storage device. Which solution will meet these requirements?
Correct answer: C
Explanation
Amazon FSx for NetApp ONTAP provides native ONTAP features, including deduplication and SnapMirror replication, so the data can stay synchronized across Regions. Using Multi-AZ FSx for ONTAP in each Region removes dependence on the on-premises storage device, because the replicated copies are stored in AWS and can be updated on a schedule from the source volume.
Why each option is right or wrong
A. Create an Amazon S3 File Gateway in the on-premises data center. Create S3 buckets in each Region. Set up a cron job to copy the data from the storage device to the S3 File Gateway. Set up S3 Cross-Region Replication (CRR) to the S3 buckets in each Region.
S3 File Gateway exposes file access to S3, not native ONTAP replication with deduplication semantics.
B. Create an Amazon FSx File Gateway in one Region. Create file servers in Amazon FSx for Windows File Server in each Region. Set up a cron job to copy the data from the storage device to the FSx File Gateway.
FSx for Windows File Server is a Windows SMB service, not a Linux ONTAP-based shared application store.
C. Create Multi-AZ Amazon FSx for NetApp ONTAP instances and volumes in each Region. Configure a scheduled SnapMirror relationship between the on-premises storage device and the FSx for ONTAP instances.
AWS FSx for NetApp ONTAP is the managed service that preserves ONTAP semantics, including block-level deduplication and SnapMirror replication, so it fits the requirement for always-up-to-date replicated Linux application data. A Multi-AZ file system is the correct deployment choice here because it stores data redundantly across two AZs within each Region for high availability, and a scheduled SnapMirror update from the on-premises ONTAP source keeps each Regional copy synchronized without making access dependent on the on-premises storage device.
D. Create an Amazon Elastic File System (Amazon EFS) file system in each Region. Deploy an AWS DataSync agent in the on-premises data center. Configure a schedule for DataSync to copy the data to Amazon EFS daily.
DataSync to EFS copies files on a schedule, but does not match native ONTAP replication requirements.