SAA-C03 · Question #568
A company hosts an application that allows authorized users to upload and download documents. The application uses Amazon EC2 instances and an Amazon Elastic File System (Amazon EFS) file system…
The correct answer is C. Set up one AWS DataSync agent in each Region. Configure Amazon EFS VPC endpoints, EFS. AWS DataSync provides managed, incremental, parallelized transfers between EFS file systems across Regions, supporting scheduled or continuously running tasks with automatic change detection, encryption in transit, and integrity verification. You can configure two tasks in…
Question
A company hosts an application that allows authorized users to upload and download documents. The application uses Amazon EC2 instances and an Amazon Elastic File System (Amazon EFS) file system. The company plans to deploy the application into a second AWS Region. The company will launch a new EFS file system and a new set of EC2 instances in the second Region. A solutions architect must develop a highly available and fault-tolerant solution to establish two-way synchronization across the Regions. Which solution will meet these requirements?
Options
- ACreate an Amazon EFS VPC endpoint for the original EFS file system in the second Region.
- BSet up EFS replication between the two EFS file systems. Set the new file system as the source.
- CSet up one AWS DataSync agent in each Region. Configure Amazon EFS VPC endpoints, EFS
- DMount the EFS file system in the second Region to the new set of EC2 instances in the second
How the community answered
(20 responses)- A5% (1)
- B10% (2)
- C80% (16)
- D5% (1)
Explanation
AWS DataSync provides managed, incremental, parallelized transfers between EFS file systems across Regions, supporting scheduled or continuously running tasks with automatic change detection, encryption in transit, and integrity verification. You can configure two tasks in opposite directions (bi- directional) to achieve two-way synchronization with high availability using agents in each Region and EFS locations connected via VPC endpoints. Native EFS replication (B) is one-way (read-only target) and not intended for active/active two-way sync. Options A and D rely on custom rsync and cross-Region mounts or SFTP, which introduce operational overhead, latency, and fail to provide resilient, managed synchronization. DataSync minimizes operational burden while delivering fault- tolerant, scalable, cross-Region EFS sync.
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