1Z0-997-25 Question 141
Select 2Your company is migrating 50 production virtual machines (VMs) from an on-premises data center to Oracle Cloud Infrastructure using Oracle Cloud Migrations. They require minimal downtime, want to test the environment in OCI before final cutover, and want to retain the original private IP addresses to maintain their existing network design. Which two statements are recommended practices for this migration plan?
- A
Shut down all on-premises source VMs before starting the replication process in Oracle Cloud Migrations.
- B
Leverage the test cutover feature in Oracle Cloud Migrations to validate the migrated environment before finalizing the production cutover.
- C
Use Oracle Cloud Migrations� incremental replication capability to reduce downtime during switchover.
- D
Place each VM in the appropriate private subnet and address range in OCI to preserve the original IP addressing scheme.
Show answer and explanation
Correct answers: B, C
Explanation
In a real-world migration scenario to OCI using Oracle Cloud Migrations, you typically replicate data while the on-premises environment remains operational to minimize downtime. A test cutover ensures the environment is validated before production, reducing the risk of critical failures. Incremental replication further helps reduce downtime by limiting the final data transfer to recent changes. For more details, consult the Oracle Cloud Migrations documentation on test migration processes, replication strategies, and recommended networking designs.
- A. Incorrect.
Option 1 is incorrect. Oracle Cloud Migrations allows replication while the source VMs are running; you do not need to shut them down first. Shutting down all VMs from the start could lead to unnecessary downtime.
- B. Correct.
Option 2 is correct. Performing a test cutover (often called a trial or test migration) is a recommended best practice. It allows you to confirm that the migrated VMs function as expected in OCI before making the final production cutover.
- C. Correct.
Option 3 is correct. Oracle Cloud Migrations enables incremental replication of VM disk data, reducing the downtime required during the final switchover. Only the final delta changes are replicated just before cutover.
- D. Incorrect.
Option 4 is partially correct about private subnets, but it is incomplete as the question focuses on recommended practices specifically offered by Oracle Cloud Migrations, such as test cutover and incremental sync. Simply placing VMs in private subnets is an important networking consideration, but it does not leverage the particular migration features needed to ensure minimal downtime and validation.