Answer: Amazon FSx for NetApp ONTAP with a Multi-AZ deployment

## Explanation **Correct Answer: B - Amazon FSx for NetApp ONTAP with a Multi-AZ deployment** Here's why this is the correct solution: ### Key Requirements Analysis: 1. **Containerized application using Amazon ECS** - All options support this 2. **Shared file system access** - All options provide shared file systems 3. **Highly durable** - All AWS file services are highly durable 4. **Recover data to another AWS Region with RPO of 8 hours** - This is the critical requirement 5. **Mount target in each Availability Zone within a Region** - All options can provide this 6. **Use AWS Backup to manage replication to another Region** - This is the key differentiator ### Why Amazon FSx for NetApp ONTAP is correct: 1. **AWS Backup Integration**: Amazon FSx for NetApp ONTAP fully integrates with AWS Backup for cross-region backup and restore operations. AWS Backup can manage the replication to another region. 2. **Multi-AZ Deployment**: FSx for ONTAP supports Multi-AZ deployments which provide high availability within a region and mount targets in each Availability Zone. 3. **Cross-Region Recovery**: AWS Backup can create backup copies in another region, meeting the RPO of 8 hours requirement. 4. **RPO Compliance**: With AWS Backup, you can schedule backups to meet specific RPO requirements, including 8-hour intervals. ### Why other options are incorrect: **A. Amazon FSx for Windows File Server with a Multi-AZ deployment**: - While it supports Multi-AZ, AWS Backup for FSx for Windows File Server does not support cross-region backup/restore natively. Cross-region replication would require other mechanisms. **C. Amazon Elastic File System (Amazon EFS) with the Standard storage class**: - EFS does support cross-region replication, but it uses EFS replication (not AWS Backup). The requirement specifically states to use AWS Backup to manage the replication. - EFS replication is a separate feature from AWS Backup. **D. Amazon FSx for OpenZFS**: - AWS Backup for FSx for OpenZFS does not support cross-region backup/restore. It only supports backups within the same region. ### Additional Considerations: - **RPO of 8 hours**: AWS Backup allows you to configure backup schedules to meet specific RPO requirements. You can set backup frequency to meet the 8-hour target. - **Mount targets in each AZ**: FSx for ONTAP Multi-AZ deployment automatically creates mount points in each Availability Zone. - **Container integration**: FSx for ONTAP supports NFS protocol which works well with containerized applications on ECS. This solution provides the required durability, cross-region recovery capability using AWS Backup, and meets all the specified requirements.