Oracle Cloud Infrastructure 2022 Architect Professional — Question 2

A telecom company has an application running in Oracle Cloud Infrastructure (OCI) Germany Central (eu-frankfurt-1) region. They want to configure Disaster Recovery (DR) site in the OCI UK South (uk-london-1) region.
Which is the most cost effective option to help set up application and persistence layers in the DR site?

Answer options

• A. Application layer: configure Events service rule in eu-frankfurt-1 region to filter Health Checks event failure and route traffic to uk-london-1 region in the event of a disaster. Persistence layer: set up policy to schedule cross-region automated backups of block volumes between eu-frankfurt-1 and uk-london-1 regions.
• B. Application layer: configure Traffic Management steering policy with Load Balancing policy between servers in eu-frankfurt-1 and uk-lordon-1 regions. Persistence layer: set up policy to schedule cross-region automated backups of block volumes between eu-frankfurt-1 and uk-london-1 regions.
• C. Application layer: set up a public load balancer in the eu-frankfurt-1 region. Create a backend set with instances running in both uk-frankfurt-1 and uk-london-1 regions. Persistence layer: set up OCI Object Storage replication from eu-frankfurt-1 region to uk-london-1 region.
• D. Application layer: configure Traffic Management steering policy with Failover policy between servers in eu-frankfurt-1 and uk-london-1 regions. Persistence layer: set up policy to schedule cross-region automated backups of file systems in File Storage service between eu-frankfurt-1 and uk-london-1 regions.

Correct answer: B

Explanation

Option B is the most cost-effective because it utilizes a Traffic Management steering policy that balances loads between the two regions and establishes a straightforward automated backup policy for block volumes, ensuring data integrity without excessive complexity or costs. Options A and D involve more complex configurations without improving cost-effectiveness. Option C requires additional resources for load balancing and object storage replication, making it less economical.