A Financial firm is planning to build a highly resilient application with primary database servers located at on-premises data centers while maintaining its DB snapshots in an S3 bucket. The IT Team is looking for a cost-effective and secure way of transferring the large customer financial databases from on-premises servers to the Amazon S3 bucket with no impact on the client usage of these applications. Also, post this data transfer, the on-premises application will be fetching data from the Amazon S3 bucket in case of a primary database failure.
So, your solution should ensure that the Amazon S3 data is fully synced with the on-premises database. Which of the following can be used to meet this requirement?

Answer options:

A.Use Amazon S3 Transfer Acceleration for transferring data between the on-premises & Amazon S3 bucket while using AWS Data Sync for accessing these S3 bucket data from the on-premises application.
B.Use AWS Data Sync for transferring data between the on-premises & Amazon S3 bucket while using AWS Storage Gateway for accessing these S3 bucket data from the on-premises application.
C.Use AWS Snowball Edge for transferring data between the on-premises & Amazon S3 bucket while using AWS Storage Gateway for accessing these S3 bucket data from the on-premises application.
D.Use AWS Transfer for transferring data between the on-premises & Amazon S3 bucket while using AWS Data Sync for accessing these S3 bucket data from the on-premises application.

Correct Answer – B
 AWS DataSync can be used for huge amounts of data transfer between on-premises & AWS. AWS Data Sync is a secure way of online data transfer. Once data is transferred to the AWS S3 bucket, AWS Storage Gateway can have data synced between on-premises servers & AWS S3 buckets.
Option A is incorrect as Amazon S3 Transfer Acceleration can be used for applications that have already integrated with Amazon S3 API.
Option C is incorrect as AWS Snowball Edge can be used for offline data transfer between on-premises & AWS S3 bucket.
Option D is incorrect as AWS Transfer is a better choice for transferring SFTP data between on-premises & Amazon S3.
For more information on using AWS DataSync, refer to the following URLs:
https://aws.amazon.com/datasync/faqs/
https://aws.amazon.com/blogs/storage/migrating-hundreds-of-tb-of-data-to-amazon-s3-with-aws-datasync/