Exam AWS Certified Solutions Architect - Professional topic 1 question 110 discussion

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

Question #: 110
Topic #: 1

[All AWS Certified Solutions Architect - Professional Questions]

A 3-Ber e-commerce web application is currently deployed on-premises, and will be migrated to AWS for greater scalability and elasticity. The web tier currently shares read-only data using a network distributed file system. The app server tier uses a clustering mechanism for discovery and shared session state that depends on IP multicast. The database tier uses shared-storage clustering to provide database failover capability, and uses several read slaves for scaling. Data on all servers and the distributed file system directory is backed up weekly to off-site tapes.
Which AWS storage and database architecture meets the requirements of the application?

A. Web servers: store read-only data in S3, and copy from S3 to root volume at boot time. App servers: share state using a combination of DynamoDB and IP unicast. Database: use RDS with multi-AZ deployment and one or more read replicas. Backup: web servers, app servers, and database backed up weekly to Glacier using snapshots.
B. Web servers: store read-only data in an EC2 NFS server, mount to each web server at boot time. App servers: share state using a combination of DynamoDB and IP multicast. Database: use RDS with multi- AZ deployment and one or more Read Replicas. Backup: web and app servers backed up weekly via AMIs, database backed up via DB snapshots.
C. Web servers: store read-only data in S3, and copy from S3 to root volume at boot time. App servers: share state using a combination of DynamoDB and IP unicast. Database: use RDS with multi-AZ deployment and one or more Read Replicas. Backup: web and app servers backed up weekly via AMIs, database backed up via DB snapshots.
D. Web servers: store read-only data in S3, and copy from S3 to root volume at boot time App servers: share state using a combination of DynamoDB and IP unicast. Database: use RDS with multi-AZ deployment. Backup: web and app servers backed up weekly via AMIs, database backed up via DB snapshots.

Show Suggested Answer

Suggested Answer: A 🗳️
Amazon Glacier doesn't suit all storage situations. Listed following are a few storage needs for which you should consider other AWS storage options instead of
Amazon Glacier.
Data that must be updated very frequently might be better served by a storage solution with lower read/write latencies, such as Amazon EBS, Amazon RDS,
Amazon DynamoDB, or relational databases running on EC2.
Reference:
https://d0.awsstatic.com/whitepapers/Storage/AWS%20Storage%20Services%20Whitepaper-v9.pdf

by kenkool at April 6, 2021, 3:21 p.m.

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amministrazione

10 months, 2 weeks ago

C. Web servers: store read-only data in S3, and copy from S3 to root volume at boot time. App servers: share state using a combination of DynamoDB and IP unicast. Database: use RDS with multi-AZ deployment and one or more Read Replicas. Backup: web and app servers backed up weekly via AMIs, database backed up via DB snapshots.

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Khannas

2 years, 9 months ago

C. Same question as 87

upvoted 3 times

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welcomeYM

2 years, 9 months ago

Selected Answer: C

CCCCCC

upvoted 2 times

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AwsSuperTrooper

3 years, 6 months ago

I conclude answer C by means of elimination: A -> database backup to glacier is not possible B -> IP multicast is not supported D -> no read slaves as needed per requirements

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AwsSuperTrooper

3 years, 6 months ago

I conclude answer D by means of elimination: A -> database backup to glacier is not possible B -> IP multicast is not supported D -> no read slaves as needed per requirements

upvoted 1 times

AwsSuperTrooper

3 years, 6 months ago

Should be C instead of D ;-(

upvoted 1 times

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cldy

3 years, 6 months ago

B. Web servers: store read-only data in an EC2 NFS server; mount to each web server at boot time. App servers: share state using a combination of DynamoDB and IP multicast. Database: use RDS with multi-AZ deployment and one or more Read Replicas. Backup: web and app servers backed up weekly via AMIs, database backed up via DB snapshots.

upvoted 1 times

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