A Tier-1 auto parts plant keeps 40 TB of quality videos on on-premises NFS with POSIX permissions. Engineers need nightly replication to Amazon S3 for analytics, bandwidth throttling during shifts, and incremental transfers with integrity validation. Which data synchronization strategy best meets the hybrid file replication requirements?
Select an answer to reveal the explanation.
Short Explanation
You've got nightly deltas, not live mounts, so scheduled moves win. DataSync acts like a night-shift courier that only carries what's new and checks every box arrived intact.
Full Explanation
The correct strategy works because AWS DataSync is purpose-built for hybrid NFS to S3 replication at scale, supporting scheduled nightly tasks, native incremental transfer after the initial full copy, built-in bandwidth throttling for shift hours, end-to-end checksum verification, and preservation of POSIX metadata required for on-premises permission consistency, which together satisfy all analytics replication constraints for 40 TB of video. The CLI-based S3 sync with Linux traffic shaping fails by concept because S3 objects accessed through standard sync do not retain NFS POSIX ownership and permissions, so while nightly incremental checksummed uploads with throttling are achieved, access fidelity and compliance are lost in translation. The Transfer Family SFTP automation fails by concept because managed SFTP jobs perform full file uploads per export without block-level incremental differencing, creating excessive nightly transfer volume and cost for large video datasets despite throttling and verified delivery controls. The S3 File Gateway caching design fails by concept because it provides continuous asynchronous upload and local caching for low-latency access rather than controlled scheduled nightly replication, which conflicts with the plant shift-aware bandwidth and batch analytics workflow. For exams, distinguish scheduled migration and synchronization from gateway caching and managed file transfer by focusing on trigger model, delta logic, and metadata handling rather than generic S3 connectivity. As a practical check, validate POSIX preservation, scheduled execution logs, throttling policies during shifts, and DataSync verification reports before promoting replicated video to analytics pipelines.