1Z0-1123-25 Question 32
Select 2You are migrating a mission-critical, multi-tier application from your on-premises data center to Oracle Cloud Infrastructure (OCI) using Oracle Cloud Migrations. The application includes a large database that must remain in sync until you perform the final cutover to OCI. Which TWO steps should you include in your migration plan to achieve minimal downtime and ensure data consistency?
- A
- Use Oracle Cloud Migrations to continuously replicate your on-premises database, and perform a final incremental sync right before cutover.
- B
- Schedule a single wave migration, shutting down the entire application for the full duration of data transfer and replication.
- C
- Configure wave-based migration groups in Oracle Cloud Migrations and place the database in read-only mode or maintenance mode during the final synchronization.
- D
- Let the application continue accepting new transactions during the final sync, relying solely on the standard replication schedule to handle data updates.
Show answer and explanation
Correct answers: A, C
Explanation
By continuously replicating data with Oracle Cloud Migrations and scheduling a final incremental synchronization, you keep your database up to date. Placing the database in read-only or maintenance mode during the final sync prevents new writes, ensuring data consistency and reducing downtime. Refer to Oracle Cloud Migrations best practices documentation for guidance on wave-based approaches and final cutover procedures.
- A. Correct.
Option 1: CORRECT. Oracle Cloud Migrations supports replicating disk data from your on-premises environment, allowing for continuous or periodic updates. A final incremental sync just before cutover ensures minimal data loss and minimal downtime.
- B. Incorrect.
Option 2: INCORRECT. Shutting down the entire application for the full duration is not aligned with minimal downtime requirements. While a single wave migration is simpler, it does not minimize downtime effectively for a mission-critical system.
- C. Correct.
Option 3: CORRECT. Oracle Cloud Migrations allows you to group application components into migration waves. Placing the database in read-only or maintenance mode during final synchronization ensures transaction consistency and helps minimize downtime during the cutover phase.
- D. Incorrect.
Option 4: INCORRECT. Continuously accepting new writes without a final lock-down or maintenance window risks data inconsistency. While Oracle Cloud Migrations can perform frequent replications, the final sync requires a controlled state to ensure data integrity.