1Z0-1123-25 Question 31
Select 2You are designing a migration strategy for a complex environment with multiple on-premises virtual machines that have interdependent services across various applications. The client requires minimal downtime and intends to utilize Oracle Cloud Migrations Service to orchestrate the move to Oracle Cloud Infrastructure (OCI). Which TWO actions are essential to ensure the migration plan properly accounts for these interdependencies and meets availability requirements?
- A
Create an accurate application dependency map and group interdependent VMs into migration waves using Oracle Cloud Migrations Service.
- B
Migrate all virtual machines in a single wave to reduce orchestration complexity.
- C
Use Oracle Cloud Migrations Service to validate source prerequisites and schedule wave-based migrations based on dependencies.
- D
Disable DNS and other network services at the source to force failover to the cloud environment immediately.
Show answer and explanation
Correct answers: A, C
Explanation
When using Oracle Cloud Migrations Service for complex environments, proper planning and phased (wave-based) migration are critical. Oracle recommends mapping application dependencies before scheduling migration waves so that related services move together. This ensures minimal downtime and reduces the risk of breaking interconnected applications. Refer to Oracle Cloud documentation on 'Migrating Virtual Machines with Oracle Cloud Migrations Service' for detailed best practices and step-by-step guidance.
- A. Correct.
Correct. By mapping out interdependencies and grouping dependent VMs in logical waves, you can minimize downtime and ensure that services remain intact when migrated to OCI. This is a best practice recommended by Oracle to handle complex environments.
- B. Incorrect.
Incorrect. Migrating all VMs at once often overlooks application dependencies that can cause unexpected downtime or performance issues. Wave-based migration allows more controlled testing and validation of each phase.
- C. Correct.
Correct. Oracle Cloud Migrations Service can help you assess source prerequisites (such as OS versions and network requirements) and orchestrate wave-based migration with minimal business impact, aligning with the client� availability requirements.
- D. Incorrect.
Incorrect. Disabling DNS or other network services prematurely can cause major disruptions in both source and target environments. You should carefully coordinate cutovers rather than force an immediate failover.