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Exam AWS Certified Solutions Architect - Professional topic 1 question 695 discussion

Exam question from Amazon's AWS Certified Solutions Architect - Professional
Question #: 695
Topic #: 1
[All AWS Certified Solutions Architect - Professional Questions]

A weather service provides high-resolution weather maps from a web application hosted on AWS in the eu-west-1 Region. The weather maps are updated frequently and stored in Amazon S3 along with static HTML content. The web application is fronted by Amazon CloudFront.
The company recently expanded to serve users in the us-east-1 Region, and these new users report that viewing their respective weather maps is slow from time to time.
Which combination of steps will resolve the us-east-1 performance issues? (Choose two.)

  • A. Configure the AWS Global Accelerator endpoint for the S3 bucket in eu-west-1. Configure endpoint groups for TCP ports 80 and 443 in us-east-1.
  • B. Create a new S3 bucket in us-east-1. Configure S3 cross-Region replication to synchronize from the S3 bucket in eu-west-1.
  • C. Use Lambda@Edge to modify requests from North America to use the S3 Transfer Acceleration endpoint in us-east-1.
  • D. Use Lambda@Edge to modify requests from North America to use the S3 bucket in us-east-1.
  • E. Configure the AWS Global Accelerator endpoint for us-east-1 as an origin on the CloudFront distribution. Use Lambda@Edge to modify requests from North America to use the new origin.
Show Suggested Answer Hide Answer
Suggested Answer: BD 🗳️
by wasabidev at March 17, 2021, 3:02 p.m.
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wasabidev
Highly Voted 3 years, 7 months ago
BD. with replication there is not more need to use S3 Transfer Acceleration
upvoted 25 times
nitinz
3 years, 7 months ago
i agree
upvoted 1 times
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KevinZhong
Highly Voted 3 years, 7 months ago
BC Seems S3 Transfer Acceleration it better to work with Edge. ------------- Amazon S3 Transfer Acceleration is a bucket-level feature that enables fast, easy, and secure transfers of files over long distances between your client and an S3 bucket. Transfer Acceleration takes advantage of the globally distributed edge locations in Amazon CloudFront.
upvoted 6 times
certainly
3 years, 7 months ago
sorry, upvoted by mistake. BD are correct. S3 Transfer Acceleration is for upload not download. https://aws.amazon.com/about-aws/whats-new/2016/04/transfer-files-into-amazon-s3-up-to-300-percent-faster/
upvoted 4 times
certainly
3 years, 7 months ago
my bad, it's also can be used for download from s3. https://aws.amazon.com/blogs/aws/aws-storage-update-amazon-s3-transfer-acceleration-larger-snowballs-in-more-regions however, i still think it is not needed as the maps are updated frequently so caching should not help much.
upvoted 2 times
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KevinZhong
3 years, 7 months ago
changed my mind to BD, seems it's not the case to use Transfer Acceleration ------------------ Why use Transfer Acceleration? You might want to use Transfer Acceleration on a bucket for various reasons: 1. Your customers upload to a centralized bucket from all over the world. 2. You transfer gigabytes to terabytes of data on a regular basis across continents. 3. You can't use all of your available bandwidth over the internet when uploading to Amazon S3.
upvoted 9 times
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syaldram
Most Recent 2 years, 4 months ago
You can't use GA as the origin for CloudFront.
upvoted 2 times
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tomosabc1
2 years, 7 months ago
Similar to StanM's response, I don't think S3 cross region replication is a good fit for this scenario, as weather map are updated frequently. The CRR replication lag means that the users in us-east-1 is always 15 minutes(or even 2 hours) slower than the users in eu-west-1 in seeing the updated weather data, which doesn't sound right in a real world scenario. S3 CRR Replication Lag Cross-Region Replication is an asynchronous process, and the objects are eventually replicated. Most objects replicate within 15 minutes, but sometimes replication can take a couple hours or more. https://aws.amazon.com/premiumsupport/knowledge-center/s3-crr-replication-time/ Can anyone explain why AC is wrong?
upvoted 1 times
tomosabc1
2 years, 7 months ago
Of course, BD surely resolves the issue in question, that is, these new users report that viewing their respective weather maps is slow from time to time. But it will create a new issue, which is the users in us-east-1 is always 15 minutes(or even 2 hours) slower than the users in eu-west-1 in seeing the updated weather data. That's not good.
upvoted 1 times
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p2010
2 years, 11 months ago
Selected Answer: BD
S3 Transfer Acceleration is for upload not download
upvoted 3 times
Jesuisleon
1 year, 11 months ago
NO, you are wrong ,S3 transfer acceleration can speed up both for upload and download, https://aws.amazon.com/s3/transfer-acceleration/
upvoted 2 times
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user0001
3 years ago
C is wrong, you can't configure o use the S3 Transfer Acceleration endpoint in us-east-1
upvoted 1 times
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kenchou73
3 years, 1 month ago
Selected Answer: BD
https://aws.amazon.com/blogs/apn/using-amazon-cloudfront-with-multi-region-amazon-s3-origins/
upvoted 1 times
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RVD
3 years, 1 month ago
Selected Answer: BD
ANS: BD are correct, C is use for data upload to local region or nearest region and from there it will transfer to destination bucket using aws backbone
upvoted 1 times
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AzureDP900
3 years, 5 months ago
I'll go with B, D
upvoted 1 times
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cldy
3 years, 5 months ago
B. Create a new S3 bucket in us-east-1. Configure S3 cross-Region replication to synchronize from the S3 bucket in eu-west-1. D. Use Lambda@Edge to modify requests from North America to use the S3 bucket in us-east-1.
upvoted 1 times
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backfringe
3 years, 5 months ago
B and D
upvoted 2 times
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andylogan
3 years, 6 months ago
It's B D - since S3 Transfer Acceleration for transferring of files over long distances this case we need replica and Lambda@Edge
upvoted 1 times
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DerekKey
3 years, 6 months ago
B&D correct. see also https://aws.amazon.com/blogs/networking-and-content-delivery/dynamically-route-viewer-requests-to-any-origin-using-lambdaedge/
upvoted 4 times
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Kopa
3 years, 6 months ago
B,D Company that has implemented the same scenarios says: To serve content from these other regions, we need to route requests to the different Amazon S3 buckets we’re using. In this post, we explore how to accomplished this by using Amazon CloudFront as a content delivery network and Lambda@Edge as a router. We will also take a quick look at how this impacts latency and cost. Reference : https://aws.amazon.com/blogs/apn/using-amazon-cloudfront-with-multi-region-amazon-s3-origins/
upvoted 1 times
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tgv
3 years, 6 months ago
BBB DDD ---
upvoted 1 times
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blackgamer
3 years, 6 months ago
B and D for sure.
upvoted 1 times
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WhyIronMan
3 years, 6 months ago
I'll go with B, D
upvoted 1 times
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