Exam AWS Certified Solutions Architect - Professional topic 1 question 861 discussion

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

Question #: 861
Topic #: 1

[All AWS Certified Solutions Architect - Professional Questions]

A company has an application. Once a month, the application creates a compressed file that contains every object within an Amazon S3 bucket. The total size of the objects before compression is 1 TB.
The application runs by using a scheduled cron job on an Amazon EC2 instance that has a 5 TB Amazon Elastic Block Store (Amazon EBS) volume attached. The application downloads all the files from the source S3 bucket to the EBS volume, compresses the file, and uploads the file to a target S3 bucket. Every invocation of the application takes 2 hours from start to finish.
Which combination of actions should a solutions architect take to OPTIMIZE costs for this application? (Choose two.)

A. Migrate the application to run an AWS Lambda function. Use Amazon EventBridge (Amazon CloudWatch Events) to schedule the Lambda function to run once each month.
B. Configure the application to download the source files by using streams. Direct the streams into a compression library. Direct the output of the compression library into a target object in Amazon S3.
C. Configure the application to download the source files from Amazon S3 and save the files to local storage. Compress the files and upload them to Amazon S3.
D. Configure the application to run as a container in AWS Fargate. Use Amazon EventBridge (Amazon CloudWatch Events) to schedule the task to run once each month.
E. Provision an Amazon Elastic File System (Amazon EFS) file system. Attach the file system to the AWS Lambda function.

Show Suggested Answer

Suggested Answer: BD 🗳️

by snakecharmer2 at April 23, 2022, 6:25 p.m.

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snakecharmer2

Highly Voted 3 years, 1 month ago

Selected Answer: BD

B & D You can write S3 streams in mutliple languages using its SDK, there is no need to download the files. You should use Fargate and not Lambda becuase the proccesing time is bigger than 15 minutes. In Fargate you only pay for the resources you consume while your container is running instead of running the EC2 instance the all month.

upvoted 12 times

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mrgreatness

Most Recent 2 years, 7 months ago

B and D for me

upvoted 1 times

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asfsdfsdf

2 years, 9 months ago

Selected Answer: BD

Looks like B and D. Lambda cant be used as the process is 2 hours - So A and E are out Regarding C - It will do a full download of the files - need to split it B - use stream (passthrough) so only the size of the stream is needed. D - Not need to pay for an instance just create a task once a month

upvoted 2 times

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Yamchi

3 years, 1 month ago

BD is for me

upvoted 1 times

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hfeng95

3 years, 1 month ago

It is B & C. The key is to avoid the network traffic during the compression. Streaming compression and local disk compression fit into this requirement.

upvoted 2 times

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Bigbearcn

3 years, 1 month ago

Selected Answer: CD

It's C and D. use Fargate instead of EC2 to optimize cost. Lambda has 15 min limits, It may not be enough to download the file, compress it and upload to S3. So A and E is rule out. For C, I am not sure Fargate local storage can store such large files because Fargate local storage max size is 200GB.

upvoted 1 times

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