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AWS Certified Solutions Architect - Associate · AWS
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Firstly the requirement is not about hybrid cloud e.g. use the data migrated to aws from on-premise, so B is gone. Secondly it is near real time, A is gone. Thirdly less admistratively, C is one since an application is a headache. D is the best , it only involves a script. SFTP is good for light file transfer. Here there are only hundreds of files in a day.
Both Amazon S3 File Gateway and AWS DataSync are suitable for this scenario. But there is a requirement for 'LEAST administrative overhead'. Option C involves the creation of an entirely new application to consume the DataSync API, this rules out this option.
This option has the least administrative overhead because: Using DataSync avoids having to rewrite the business system to use a new file gateway or SFTP endpoint. Calling the DataSync API from an application allows automating the data transfer instead of running scheduled tasks or scripts. DataSync directly transfers files from the network share to S3 without needing an intermediate server