1Z0-1072-25 Question 38
Single answerYour organization runs a highly available web application on a single Compute instance in Oracle Cloud Infrastructure (OCI). OCI has notified you of a scheduled infrastructure maintenance event that will cause a mandatory reboot of the physical host next week. You must ensure minimal downtime. Which strategy best addresses this issue?
- A
Migrate the instance to a different region a few days before the maintenance event to avoid downtime.
- B
Wait for the scheduled maintenance and rely on automatic live migration to keep your instance running.
- C
Deploy additional Compute instances across different Availability Domains and place them behind a load balancer.
- D
Cancel the scheduled maintenance from the OCI console and resume normal operations.
Show answer and explanation
Correct answer: C
Explanation
When OCI schedules a physical host maintenance, a reboot is typically required and cannot be bypassed. To maintain high availability, Oracle recommends running multiple instances across different Availability Domains and using a load balancer or similar redundancy strategy. This ensures traffic can be served by at least one healthy instance while another undergoes maintenance. For more details, refer to OCI's High Availability and Disaster Recovery documentation.
- A. Incorrect.
Option 1 is incorrect. Migrating to a different region might mitigate local events, but it is typically more complex and may not be feasible if your application or data dependencies are tied to the current region. This approach also does not necessarily guarantee zero downtime.
- B. Incorrect.
Option 2 is incorrect. While some shapes may support live migration in limited scenarios, not all OCI shapes guarantee live migration during maintenance events. Relying solely on this belief can lead to unexpected downtime if your shape or region does not support it.
- C. Correct.
Option 3 is correct. Deploying multiple Compute instances in different Availability Domains and placing them behind an OCI load balancer is the recommended high availability approach. You can temporarily remove the instance undergoing the maintenance reboot from the load balancer pool, so traffic continues to flow to the healthy instances. This setup greatly minimizes interruption during maintenance events.
- D. Incorrect.
Option 4 is incorrect. You cannot cancel Oracle� infrastructure maintenance events. They are performed as needed to ensure the stability, security, and performance of underlying hardware and network resources. Customers can only adjust or plan around these maintenance windows, not cancel them.