1Z0-997-25 Question 145
Select 2Your company is planning to migrate a mission-critical, multi-tier web application from its on-premises data center to Oracle Cloud Infrastructure (OCI) using Oracle Cloud Migrations. The application is composed of multiple VMs running front-end web services, a middle-tier application server, and a large database. The business requires minimal downtime and data consistency during the transition. Which two steps should you include in your migration plan to meet these requirements?
- A
A. Install the Oracle Cloud Migrations Agent on the VMs and configure incremental replication to replicate VM images and data continuously before the final cutover.
- B
B. Perform a one-time bulk export of database data to Object Storage and manually restore it in OCI to avoid installing migration agents.
- C
C. Use Oracle GoldenGate or Data Guard with Oracle Cloud Migrations to maintain near-real-time database synchronization and minimize downtime for the database tier.
- D
D. Migrate the front-end tier alone first and then handle the database migration after completely shutting down on-premises systems.
Show answer and explanation
Correct answers: A, C
Explanation
A successful minimal-downtime migration strategy with Oracle Cloud Migrations typically involves installing the Oracle Cloud Migrations Agent on the source VMs to enable incremental replication. For large or mission-critical databases, using Oracle GoldenGate or Data Guard alongside Oracle Cloud Migrations can further synchronize data in near real-time, ensuring minimal downtime and high data consistency at the final cutover. Refer to Oracle� official documentation on Oracle Cloud Migrations and GoldenGate Data Replication for additional guidance on designing end-to-end migration plans.
- A. Correct.
A. CORRECT. Using the Oracle Cloud Migrations Agent to set up incremental replication for VMs is a recommended approach to reduce downtime. It replicates VM images and data over time, so the final cutover window can be shortened.
- B. Incorrect.
B. INCORRECT. A simple one-time bulk export of database data could lead to data inconsistency and longer downtime while restoring the data in OCI. This approach also bypasses the advanced capabilities of Oracle Cloud Migrations and can disrupt critical workloads.
- C. Correct.
C. CORRECT. Integrating Oracle GoldenGate or Data Guard with Oracle Cloud Migrations for database synchronization keeps on-premises and target databases nearly in sync, reducing downtime and ensuring data consistency at cutover.
- D. Incorrect.
D. INCORRECT. Migrating just the front-end tier first while shutting down the entire on-premises environment for the database can cause unnecessary downtime and disrupt the business. A phased approach with continuous replication is more suitable for minimal downtime requirements.