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Question 79

A company manages a web application that runs on Amazon EC2 instances behind an Application Load Balancer (ALB). The EC2 instances run in an Auto

Scaling group across multiple Availability Zones. The application uses an Amazon RDS for MySQL DB instance to store the data. The company has configured

Amazon Route 53 with an alias record that points to the ALB.

Anew company guideline requires a geographically isolated disaster recovery (DR) site with an RTO of 4 hours and an RPO of 15 minutes.

Which DR strategy will meet these requirements with the LEAST change to the application stack?

    Correct Answer: D

    To meet the requirements of a geographically isolated disaster recovery site with an RTO of 4 hours and an RPO of 15 minutes, the best strategy is to launch a replica environment of everything except Amazon RDS in a different AWS Region, create an RDS read replica in the new Region, and configure the new environment to point to the local RDS DB instance. Additionally, adding the new stack to the Route 53 record set using a health check to configure a failover routing policy and promoting the read replica to primary in the event of an outage ensures minimum downtime and data loss. This approach provides better RPO and RTO compared to creating and restoring snapshots during an outage as it ensures the data is replicated in near real-time and is readily available, aligning with the company's guidelines.

Discussion
saeidp

D is correct. Creating snapshot after outage is too late. RPO is the time between snapshots that DR can tolerate

saeidp

Latest snapshot might be older than 15 minutes. Answere doesn't say anything about the last time snapshot has been created. it just say latest snapshot

PiccasoOption: D

A must be wrong because of "in a different Availability Zone" B is eliminated because of "latency routing policy". Between C and D, the correct answer shows C, I do not understand. Some people say that "RTO of 4 hours and RPO of 15 minutes" does not require "read replica". However, it's not guaranteed that the steps in C can be done in the limited time length.

syaldram

D is the asnwer!

helloworldabc

DDDDDDDD

ohcnOption: D

D - https://www.examtopics.com/discussions/amazon/view/2840-exam-aws-devops-engineer-professional-topic-1-question-36/

auxwww

If there is a region outage, then backups may not be even accessible to restore the database, unless cross region backups are configured on the RDS instance. C - Doesn't state this. RPO and RTO cannot be achieved due to the above scenario. D - is least change to stack. RPO and RTO are guaranteed even with an AWS Region outage let alone customer specific regional outage.

DucSiu

D is correct

ParagSanyashivOption: D

D is more suitable. Putting the stress on Failover concept for disaster recovery.

sasa33_pOption: D

D looks good.

bihaniOption: D

Answering C is plain stupid. You can achieve the 15 mins RPO with C. D is correct answer.

Bulti

D is the correct answer