Exam AWS Certified Solutions Architect - Associate SAA-C02 topic 1 question 238 discussion

A. If we want to one time migrate data, not for synchronization. B. Sounds the best use case for file gateway. C. We're not really backing up volumes. D. Same as A. Any inputs? My bet is B.

Ans: "B" is very suitable My 2 cents: Given requirement "The legacy application cannot handle the growing size of .csv files. New .csv files are added daily from various data sources to a central on-premises storage location. The company wants to continue to support the legacy application while users learn AWS analytics services." DataSync can't store on-premises. Only storage gateway can handle growing on-premises storage need. Hope this helps!!

A for sure. Because "synchronization"

Definitely not A because the requirement is to maintain two synchronized copies of files. DataSync comes to use when you want to make a one-time migration of data. B can be the ideal answer as the file gateway can be used to maintain synchronized copies of data between on-prem and Amazon S3.

The legacy application cannot handle the growing size of .csv files. So the question is not keeping 2 copies. The question is moving .csv files to cloud while still enable the onprem to use the files. So Storage Gateway. Datasync is just for syncing data.

A is the answer

Scheduling your DataSync tasks DataSync provides a scheduling feature that enables customers to automatically execute transfer tasks to detect and copy changes from the source storage to the destination storage at specified intervals. Scheduling is handy if you want to execute recurring tasks to migrate data between on-premises and AWS Cloud storage. It enables you to transfer data to the cloud for running analytics and deriving insights, and to replicate data to AWS for disaster recovery or running hybrid applications. With DataSync scheduling, you can do all this without needing to write and run scripts to track repeated transfers. https://aws.amazon.com/es/blogs/storage/scheduling-a-secure-data-transfer-using-aws-datasync/

"a solutions architect wants to maintain two synchronized copies of all the .csv files on-premises and in Amazon S3". If you need TWO copies you need DataSync. Storage gateway can cache data but primarily stores it on AWS. Just one copy...

picked B. Datasync is not continious, it is scheduled (hourly, dayly, etc). this means data are not sync all the time

Datasync is syncronous with s3

Definitely B: you need to schedule tasks for datasync to do continuous transfer, where storage gateway does it automatically. Keyword in the question is: synchronized copies Here is a blog post explaining scheduling: https://aws.amazon.com/blogs/storage/scheduling-a-secure-data-transfer-using-aws-datasync/

B is the answer guys

AWS DataSync is an online data transfer service that simplifies, automates, and accelerates moving data between storage systems and services. Amazon S3 File Gateway –Amazon S3 File Gateway supports a file interface into Amazon Simple Storage Service (Amazon S3) and combines a service and a virtual software appliance. By using this combination, you can store and retrieve objects in Amazon S3 using industry-standard file protocols such as Network File System (NFS) and Server Message Block (SMB). question stated *.CSV files. B is correct.

"to keep two synchronized copies of all.csv files on-premises and on Amazon S3" A should be better. https://aws.amazon.com/blogs/storage/synchronizing-your-data-to-amazon-s3-using-aws-datasync/

A Reference: https://aws.amazon.com/blogs/storage/synchronizing-your-data-to-amazon-s3-using-aws-datasync/

DataSYNC is for migration.. not syncing/backup

Answer is A.