1Z0-1123-25 Question 131
Single answerYou are designing a full stack DR solution for a mission-critical multi-tier application hosted in OCI. The application consists of multiple Compute instances (front-end and application tiers), a DB System, Block Volumes, and an OCI Load Balancer in the primary region. You want to ensure that if the primary region becomes unavailable, you can orchestrate a failover to the secondary region with minimal manual intervention. Which design approach meets these requirements?
- A
Use OCI Full Stack Disaster Recovery Service to automate resource replication and define a DR plan that orchestrates failover steps in a single workflow.
- B
Rely solely on a multi-AD deployment in the primary region to maintain resource redundancy and avoid the need for a secondary region.
- C
Implement manual DR scripts for each layer (Compute, Storage, DB) and rely on Regional Autonomous Data Guard for the database component only.
- D
Use external job schedulers for replication and combine them with custom Terraform templates for partial failover automation.
Show answer and explanation
Correct answer: A
Explanation
OCI Full Stack Disaster Recovery Service is designed to coordinate the replication and failover of multi-tier applications in OCI. By defining umbrella 'protection groups' and orchestration plans, it streamlines the failover process and ensures consistency across all components. Refer to the Oracle documentation on Full Stack DR (https://docs.oracle.com/en-us/iaas/Content/FullStackDR/home.htm) for best practices and step-by-step guidelines on configuring end-to-end disaster recovery across regions.
- A. Correct.
Correct. OCI Full Stack Disaster Recovery Service enables you to define DR protection groups and orchestration plans. It automates the replication of resources (Compute, Database, Block Volumes, Load Balancer configurations) to the secondary region and provides a single workflow for failover. This significantly reduces manual steps during a region-wide outage.
- B. Incorrect.
Incorrect. While using multiple Availability Domains in a single region can provide high availability, it does not protect against a complete region failure. A separate region is necessary for true disaster recovery.
- C. Incorrect.
Incorrect. Employing manual DR scripts for each component can be error-prone and time-consuming, especially under pressure. Using separate tools for each layer increases complexity compared to an integrated full stack approach.
- D. Incorrect.
Incorrect. Although external job schedulers and Terraform can automate some parts of the environment, they lack the integrated orchestration and consistency checks provided by OCI Full Stack Disaster Recovery Service. Partial automation leaves room for configuration drift and manual errors.