1Z0-997-25 Question 142
Select 2Your team is migrating a multi-tier e-commerce application from an on-premises data center to Oracle Cloud Infrastructure (OCI) using Oracle Cloud Migrations. The goal is to minimize downtime while ensuring data consistency, especially given a large production database. Which TWO steps would you recommend to reduce the impact on ongoing operations during the migration process?
- A
A. Shut down the on-premises database early in the migration process to prevent any data inconsistencies.
- B
B. Configure an incremental replication schedule to keep the OCI environment updated in near real-time before the final cutover.
- C
C. Migrate all resources in a single wave to simplify and accelerate the process.
- D
D. Group interdependent services into migration waves and test each wave before moving to the next.
Show answer and explanation
Correct answers: B, D
Explanation
To minimize downtime with Oracle Cloud Migrations, you typically employ an incremental replication strategy to keep data in sync and plan for short final cutovers. Additionally, grouping related services into migration waves allows for staged testing and reduces business risk. This approach is documented in Oracle� best practices for Oracle Cloud Migrations, which can be found in the official OCI documentation.
- A. Incorrect.
A. Incorrect. Completely shutting down the on-premises database early in the migration process is unnecessary and causes prolonged downtime. It is generally more efficient to use incremental replication or a similar approach to maintain data availability until a brief final cutover.
- B. Correct.
B. Correct. Setting up incremental replication in Oracle Cloud Migrations helps keep target systems up to date and reduces the downtime window needed for the final cutover. This is especially important for large databases that must remain accessible during most of the migration process.
- C. Incorrect.
C. Incorrect. Migrating everything in a single wave increases complexity and risk. If any single component encounters an issue, the entire application� migration is delayed. A phased (wave-based) approach is typically recommended to mitigate risk and thoroughly test each phase.
- D. Correct.
D. Correct. Grouping interdependent services together and migrating them in waves is a best practice. Testing each wave ensures that issues are discovered and resolved before moving to the next set of workloads, reducing overall downtime and risk.