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Exam AWS Certified Solutions Architect - Professional topic 1 question 417 discussion

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

Question #: 417
Topic #: 1

[All AWS Certified Solutions Architect - Professional Questions]

A company operates a group of imaging satellites. The satellites stream data to one of the company's ground stations where processing creates about 5 GB of images per minute. This data is added to network-attached storage, where 2 PB of data are already stored.
The company runs a website that allows its customers to access and purchase the images over the Internet. This website is also running in the ground station.
Usage analysis shows that customers are most likely to access images that have been captured in the last 24 hours.
The company would like to migrate the image storage and distribution system to AWS to reduce costs and increase the number of customers that can be served.
Which AWS architecture and migration strategy will meet these requirements?

A. Use multiple AWS Snowball appliances to migrate the existing imagery to Amazon S3. Create a 1-Gb AWS Direct Connect connection from the ground station to AWS, and upload new data to Amazon S3 through the Direct Connect connection. Migrate the data distribution website to Amazon EC2 instances. By using Amazon S3 as an origin, have this website serve the data through Amazon CloudFront by creating signed URLs.
B. Create a 1-Gb Direct Connect connection from the ground station to AWS. Use the AWS Command Line Interface to copy the existing data and upload new data to Amazon S3 over the Direct Connect connection. Migrate the data distribution website to EC2 instances. By using Amazon S3 as an origin, have this website serve the data through CloudFront by creating signed URLs.
C. Use multiple Snowball appliances to migrate the existing images to Amazon S3. Upload new data by regularly using Snowball appliances to upload data from the network-attached storage. Migrate the data distribution website to EC2 instances. By using Amazon S3 as an origin, have this website serve the data through CloudFront by creating signed URLs.
D. Use multiple Snowball appliances to migrate the existing images to an Amazon EFS file system. Create a 1-Gb Direct Connect connection from the ground station to AWS, and upload new data by mounting the EFS file system over the Direct Connect connection. Migrate the data distribution website to EC2 instances. By using webservers in EC2 that mount the EFS file system as the origin, have this website serve the data through CloudFront by creating signed URLs.

Show Suggested Answer

Suggested Answer: B 🗳️

by DalianYifang at Sept. 9, 2019, 6:26 p.m.

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donathon

Highly Voted 3 years, 8 months ago

A B: This will take too long. C: The users will not be able to access the data in the last 24 hours this way. D: Although EFS would work and it has higher performance, it’s almost 10x more expensive then S3 and hence does not meet the criteria of reducing cost.

upvoted 46 times

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cpt

Highly Voted 3 years, 8 months ago

I believe because only the data/images of the last 24 hours seems to be relevant. It seems to indicate that there is no urgency to migrate the old data (2PB) over to S3 in short time (which could be achieved with Snowball). Instead this can take as long as it needs. By not using Snowball, we can save money. NOTE: "DX" will be setup in both Answers A) and B). Therefore skipping Snowball will reduce the overall cost of Answer B) compared to A).

upvoted 10 times

newme

3 years, 7 months ago

Good point. But cost isn't said to be a problem here, so snowball is a better solution, isn't it? And using 1Gb DX, it really will take a long time, more than 100 days, to upload data...

upvoted 2 times

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Shanmahi

3 years, 7 months ago

Good point. However, question states, "most likely last 24 hours", so there is a chance of purchasing something older than 24 hours which is part of existing 2 PB data. Everything else, you have explained perfectly fine. Answer A is best option.

upvoted 2 times

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Ni_yot

Most Recent 2 years, 7 months ago

Selected Answer: A

A looks to be the better ans. S3 a better choice to copy data to

upvoted 1 times

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sg0206

2 years, 7 months ago

A is the aswer. Send the exisiting data using snowflex appliances and for immediate generating data, use direct connect to upload..

upvoted 1 times

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kangtamo

2 years, 11 months ago

Selected Answer: A

Agree with A: S3.

upvoted 1 times

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AzureDP900

3 years, 5 months ago

I'll go with A

upvoted 1 times

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cldy

3 years, 6 months ago

A. Use multiple AWS Snowball appliances to migrate the existing imagery to Amazon S3. Create a 1-Gb AWS Direct Connect connection from the ground station to AWS, and upload new data to Amazon S3 through the Direct Connect connection. Migrate the data distribution website to Amazon EC2 instances. By using Amazon S3 as an origin, have this website serve the data through Amazon CloudFront by creating signed URLs.

upvoted 1 times

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andylogan

3 years, 7 months ago

It's A

upvoted 1 times

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DonSp

3 years, 7 months ago

The most reasonable solution is A. B works technically but the 1-Gb Direct Connect connection will largely be taken up by new data coming in at a rate of 5 GB/min. Furthermore, you would not want to transfer 2 PB of achives from the command line but instead use a File Storage gateway.

upvoted 1 times

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Radhaghosh

3 years, 7 months ago

Copy 2TB of data via 1 Gb DX will take close to 195 days. So snowball is the best option. Option A

upvoted 3 times

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blackgamer

3 years, 7 months ago

A. Data is too much to copy over network, snowball is the answer here.

upvoted 1 times

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WhyIronMan

3 years, 7 months ago

I'll go with A

upvoted 1 times

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RomanTsai

3 years, 7 months ago

Answer should be B. Using Snowball is a very very very bad choice which take a lot of time to waiting device available, delivery / transport data, upload to S3. My bad experience took 1 week to complete all if lucky to have a device available without any waiting.

upvoted 1 times

nitinz

3 years, 7 months ago

AWS is not looking for your experience with snowball in certification exam. They are looking for ideal answer, which is A.

upvoted 4 times

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gpark

3 years, 7 months ago

B. Requirements are "most likely to access images that have been captured in the last 24 hours." Only 24 hours data has a priority. 2PB is not emergent. There is no restriction to send 2PB within 1 month.

upvoted 1 times

gpark

3 years, 7 months ago

B is wrong. Have searched best practises on AWS. Over PB, Snowmobile is the one. My apology for confusion.

upvoted 1 times

sarah_t

3 years, 7 months ago

Amazon recommends Snowmobile for migrating more than 10 PB

upvoted 1 times

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wind

3 years, 7 months ago

B is wrong, the 1Gb DX has 100MB/s actual network bindwidth, this will be used by migrating the existing data and transferring new generated data, it's impossible. A is correct.

upvoted 1 times

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Kian1

3 years, 7 months ago

going with A

upvoted 2 times

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AJBA

3 years, 7 months ago

A should be the answer, It's very important that sometimes we look for the users using AWS recommendation. For PB of data, it should be snowball.

upvoted 4 times

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