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Exam AWS Certified Database - Specialty topic 1 question 91 discussion

Exam question from Amazon's AWS Certified Database - Specialty

Question #: 91
Topic #: 1

[All AWS Certified Database - Specialty Questions]

A database specialist at a large multi-national financial company is in charge of designing the disaster recovery strategy for a highly available application that is in development. The application uses an Amazon DynamoDB table as its data store. The application requires a recovery time objective (RTO) of 1 minute and a recovery point objective (RPO) of 2 minutes.
Which operationally efficient disaster recovery strategy should the database specialist recommend for the DynamoDB table?

A. Create a DynamoDB stream that is processed by an AWS Lambda function that copies the data to a DynamoDB table in another Region.
B. Use a DynamoDB global table replica in another Region. Enable point-in-time recovery for both tables.
C. Use a DynamoDB Accelerator table in another Region. Enable point-in-time recovery for the table.
D. Create an AWS Backup plan and assign the DynamoDB table as a resource.

Show Suggested Answer

Suggested Answer: B 🗳️

by shantest1 at April 8, 2021, 2:20 p.m.

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Comments

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shantest1

Highly Voted 3 years, 9 months ago

B DynamoDB global tables

upvoted 16 times

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Suresh108

Highly Voted 3 years, 8 months ago

BBBBBBBBBBB global tables are multi master replication enabled solution. it meets the requirement.

upvoted 6 times

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IhorK

Most Recent 1 year, 11 months ago

Selected Answer: B

- A single Amazon DynamoDB global table can only have one replica table per AWS Region. - You can enable point-in-time recovery on each replica of a global table. https://aws.amazon.com/dynamodb/global-tables/?nc1=h_ls

upvoted 2 times

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lollyj

2 years, 6 months ago

Selected Answer: B

Only logical answer. Backups take too long to restore. Global tables are synchronously updated

upvoted 1 times

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sachin

3 years ago

It is asking for DR soulution. My vote is for A . If you need less RPO and RTO setup Streams and Kinesis, Lambda and you can achive the given RPO RTO, RPO is 5 mins in usual automated backups . B could be true but in global tables also RPO is 5 mins

upvoted 2 times

Jiang_aws1

2 years, 9 months ago

B is correct. Global table is multi master & it is sync up with few sec

upvoted 2 times

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Dantas

3 years, 1 month ago

Selected Answer: B

Two-minute recovery point objective (RPO).

upvoted 2 times

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novice_expert

3 years, 2 months ago

Selected Answer: B

x A. Create a DynamoDB stream that is processed by an AWS Lambda function that copies the data to a DynamoDB table in another Region. (good if B is wrong) B. Use a DynamoDB global table replica in another Region. Enable point-in-time recovery for both tables. (PITR is distraction btw PITR takes 5 min recovery, but global table will auto failover to good region, right?) x C. DynamoDB Accelerator (its for read caching) x D. Create an AWS Backup plan and assign the DynamoDB table as a resource. (takes 1 hour)

upvoted 4 times

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marcoeu

3 years, 2 months ago

Selected Answer: B

B because of RTO and RPO limits defined. D is good solution doesn't fit limits. DynamoDB Accellerator is distractor for DR question.

upvoted 2 times

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Sandy1971

3 years, 5 months ago

Selected Answer: D

A, B and C are not DR solutions for Dynamo DB. Global Tables is multi region replication. D meets the objective . You can set up scheduled backups for Amazon DynamoDB using AWS Backup.. https://aws.amazon.com/blogs/database/set-up-scheduled-backups-for-amazon-dynamodb-using-aws-backup/

upvoted 1 times

RotterDam

3 years, 4 months ago

to get RPO of 2 minutes you will have to create a backup plan that backs up < 2 minutes!! Thats not what backup is for

upvoted 5 times

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Shunpin

3 years, 6 months ago

Selected Answer: B

I will go to B. https://s3.amazonaws.com/solutions-reference/multi-region-application-architecture/latest/multi-region-application-architecture.pdf

upvoted 2 times

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toppic26

3 years, 8 months ago

A is the answer. D is wrong. Restore takes nearly 1 hour https://docs.aws.amazon.com/amazondynamodb/latest/developerguide/backuprestore_HowItWorks.html B is wrong. RPO is about 5 mins. A is true. If you need less RPO and RTO setup Streams and Kinesis, Lambda whatever

upvoted 4 times

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