Exam AWS Certified Solutions Architect - Professional topic 1 question 850 discussion

D https://aws.amazon.com/datasync/faqs/

A private VIF to directly sent data to EFS using DataSync is the most efficient solution, so D is the correct answer Sending data through a public VIF to S3 and then copying it to EFS is inefficient, so C is incorrect

OPTION C: One way to replicate the images from the on-premises NFS file system to the Amazon EFS file system after the migration cutover is to use an AWS Lambda function to process event notifications from Amazon S3. The Lambda function can be triggered when new images are added to an S3 bucket, and it can then copy the images from S3 to the EFS file system. This will be an operationally efficient way to replicate the images as it is an event-driven, serverless architecture that can automatically scale to handle the number of images being written each night. And also S3 bucket can automatically trigger the lambda function when any new image is added to the bucket. This will be efficient and cost effective as well and will not require any manual intervention

D : "What is the MOST operationally efficient way to replicate the images?" C works but we dont need to go roundabout way and involve S3 here. we are actually connecting datasync service through the privatelink not the EFS. the phrase " vpc endpoint for EFS" is just to create confusion, actaully it does mean we are connecting datasync service through it and then datasync service can run on EFS

Correct C.

I'll go with C

C - event notifications is the most operationally efficient way

D for me

https://www.youtube.com/watch?v=_snUm9g5jG0

Answer is C. D won't work as VPC Endpoints for EFS are to the control/management APIs, not for data transfer

D is WRONG! DataSync agent can ONLY use VPC endpoint for "DataSync", not VPC endpoint for "EFS".

https://aws.amazon.com/blogs/storage/transferring-files-from-on-premises-to-aws-and-back-without-leaving-your-vpc-using-aws-datasync/

The only option that comments the need of a task schedule it's the option D, also if you have a DX, you can use a vpc endpoint for the transmission, so it's correct: https://aws.amazon.com/datasync/faqs/?nc1=h_ls

Option is D. Using the AWS direct, you can only connect over private VIF. https://docs.aws.amazon.com/whitepapers/latest/aws-vpc-connectivity-options/aws-direct-connect.html Once you are connected to the VPC, then accessing EFS is only possible by private LINK and EFS.

I agree - D. How do I use datasync to migrate data to AWS? Configure DataSync to make an initial copy of your entire dataset, and schedule subsequent incremental transfers of changing data until the final cut-over from on-premises to AWS

D. https://docs.aws.amazon.com/efs/latest/ug/gs-step-four-sync-files.html Now that you have created a functioning Amazon EFS file system, you can use AWS DataSync to transfer files from an existing file system to Amazon EFS. AWS DataSync is a data transfer service that simplifies, automates, and accelerates moving and replicating data between on-premises storage systems and AWS storage services over the internet or AWS Direct Connect. AWS DataSync can transfer your file data, and also file system metadata such as ownership, timestamps, and access permissions. Can option C work? Yes, but that's a lot of unnecessary action. Remember, the question says "What is the MOST OPTIMAL method for replicating the images?"

vote for D