Exam AWS Certified Solutions Architect - Professional topic 1 question 441 discussion

Exam question from Amazon's AWS Certified Solutions Architect - Professional

Question #: 441
Topic #: 1

[All AWS Certified Solutions Architect - Professional Questions]

A company is running a .NET three-tier web application on AWS. The team currently uses XL storage optimized instances to store and serve the website's image and video files on local instance storage. The company has encountered issues with data loss from replication and instance failures. The Solutions Architect has been asked to redesign this application to improve its reliability while keeping costs low.
Which solution will meet these requirements?

A. Set up a new Amazon EFS share, move all image and video files to this share, and then attach this new drive as a mount point to all existing servers. Create an Elastic Load Balancer with Auto Scaling general purpose instances. Enable Amazon CloudFront to the Elastic Load Balancer. Enable Cost Explorer and use AWS Trusted Advisor checks to continue monitoring the environment for future savings.
B. Implement Auto Scaling with general purpose instance types and an Elastic Load Balancer. Enable an Amazon CloudFront distribution to Amazon S3 and move images and video files to Amazon S3. Reserve general purpose instances to meet base performance requirements. Use Cost Explorer and AWS Trusted Advisor checks to continue monitoring the environment for future savings.
C. Move the entire website to Amazon S3 using the S3 website hosting feature. Remove all the web servers and have Amazon S3 communicate directly with the application servers in Amazon VPC.
D. Use AWS Elastic Beanstalk to deploy the .NET application. Move all images and video files to Amazon EFS. Create an Amazon CloudFront distribution that points to the EFS share. Reserve the m4.4xl instances needed to meet base performance requirements.

Show Suggested Answer

Suggested Answer: B 🗳️

by donathon at Sept. 27, 2019, 2:58 a.m.

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donathon

Highly Voted 3 years, 8 months ago

B A: EFS is more than 10 times more expensive than S3 although it has better performance. This is where CloudFront comes in to mitigate the performance impact caused by S3. C: S3 does not suppose server side scripting (.net). D: Cloudfront origin must be S3 or HTTP based. EFS is not HTTP. https://docs.aws.amazon.com/AmazonS3/latest/dev/WebsiteHosting.html

upvoted 60 times

Moon

3 years, 8 months ago

great analysis.

upvoted 4 times

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Kopa

3 years, 7 months ago

Also remaining costly instances stay the same!!

upvoted 1 times

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DashL

3 years, 7 months ago

Only caveat with this analysis is that "currently uses XL storage optimized instances to store and serve image and video files". If S3 and CloudFront is used, where do the EC2 instances and the load balancer fit in? But Elastic Beanstalk can be used with EFS. Does it matter if the languahe is .NET? So the answer should be D.

upvoted 1 times

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AWSPro24

Highly Voted 3 years, 8 months ago

This is .NET and talking tiers not microservices so likely on Windows Server EC2 instances. EFS is not great for Windows. It can be connected by SMB but this is not recommended. FSX is preferable where Windows shares are needed. Supports SMB and NTFS natively.

upvoted 6 times

AWS_Noob

3 years, 7 months ago

Good observation

upvoted 2 times

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dmscountera

Most Recent 2 years, 8 months ago

3 years, 8 months ago

I'll go with B

upvoted 2 times

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