Exam AWS Certified Solutions Architect - Associate SAA-C03 topic 1 question 110 discussion

To meet the requirements of reducing coupling within the application and improving website performance, the solutions architect should consider taking the following actions: C. Configure the application to upload images directly from each user's browser to Amazon S3 through the use of a pre-signed URL. This will allow the application to upload images directly to S3 without having to go through the web server, which can reduce the load on the web server and improve performance. D. Configure S3 Event Notifications to invoke an AWS Lambda function when an image is uploaded. Use the function to resize the image. This will allow the application to resize images asynchronously, rather than having to do it synchronously during the upload request, which can improve performance.

Why would anyone vote C? signed URL is for temporary access. also, look at the vote here: https://www.examtopics.com/discussions/amazon/view/82971-exam-aws-certified-solutions-architect-associate-saa-c02/

Ans B, D - 1st: Upload the original images to Amazon S3 2nd: Configure S3 Event Notifications to invoke an AWS Lambda function when an image is uploaded to resize the image.

I am voting for C and D. B and D could also work, but when you upload the images to the EC2 and then to S3 it could cause additional performance and network traffic load.

I don't understand why the expiration time of presigned urls is being questioned. You can certainly design an upload flow that uses the SDK to create a new presigned url before uploading.

B and D is the way to go

CD - No point having the instance do extra work when we can use pre signed URLs and let the user directly upload to S3, hence B is not an operationally efficient option. Furthermore B results in more traffic through the instance which is inefficient.

C is not a valid option to upload the image is to have presigned url to retrieve the file/image from S3

BD is more reasonable than CD

BD is the answer, idk why anyone would choose c ?? pre-signed urls are for security pursoses

GPT4 option B would offload the storage to S3 but still involves the web server in the upload process, which does not fully address the performance issues.

GPT4 option B would offload the storage to S3 but still involves the web server in the upload process, which does not fully address the performance issues.

C: presigned URL can be used to upload images to S3 https://docs.aws.amazon.com/AmazonS3/latest/userguide/PresignedUrlUploadObject.html D: scalable event processing for image resizing using lambda A: Glacier? B: Can work and maybe improves the performance also as the webserver is not resizing the image (if D is used in combination with this). However, C is better E: Irrelevant

B could be excluded because of these two points: - During upload requests, the website resizes the images to a standard size and stores the resized images in Amazon S3. - Users are experiencing slow upload requests to the website.

C is out of question as URL is not generated by user and highest validity is 7 days. So if user needs to access same file after 7 days it would be very troublesome.

based on decoupling requirement, Answer B still go thru Web server before drop the file into S3. Answer CD

pre-signed URL is temporary decoupling meas preventing server from uplaoding and doing the resizing at the same time so separating the processing into 2 parts (uplaod, then notify, then resize) is considered decoupling