1Z0-997-25 Question 143
Single answerYour company needs to migrate a mission-critical, multi-VM application from an on-premises virtualized environment to OCI with minimal downtime. They plan to use Oracle Cloud Migrations to streamline data replication and cutover, ensuring the application is quickly brought online in the OCI environment. Which approach will best meet their requirement for minimal downtime?
- A
Perform data replication to OCI using Oracle Cloud Migrations, schedule a final cutover after the initial data sync completes, then bring the application VMs online in the target environment.
- B
Export each on-premises VM as an OVA file, upload them to an OCI Object Storage bucket, and launch new compute instances from those OVA files when convenient.
- C
Use Oracle Data Transfer Appliance to move the on-premises file system data to OCI, but then build the application compute environment from scratch.
- D
Migrate only the database tier to an Autonomous Database in OCI and let Oracle Cloud Migrations completely reconfigure the application tier automatically.
Show answer and explanation
Correct answer: A
Explanation
Oracle Cloud Migrations helps automate and streamline the migration of on-premises VMs to OCI with minimal downtime. It handles data replication, orchestration of the cutover process, and final synchronization steps. Using OVA-based exports or Data Transfer Appliance alone often introduces additional downtime and manual steps. Refer to the Oracle Cloud Infrastructure documentation for Oracle Cloud Migrations (https://docs.oracle.com/en-us/iaas/Content/cloud-migrations/overview.htm) for detailed guidelines on end-to-end designs ensuring minimal disruption for production workloads.
- A. Correct.
Correct. This follows best practices for a minimal downtime migration using Oracle Cloud Migrations. You replicate the on-premises VMs to OCI, confirm that data synchronization is complete, and then perform a final cutover at a convenient time. This approach uses the built-in replication and orchestration features from Oracle Cloud Migrations, minimizing downtime while ensuring consistency between your source and target environments.
- B. Incorrect.
Incorrect. Although exporting VMs as OVA files and importing them into OCI could work, it usually involves prolonged downtime because the VMs must be taken offline during export. Moreover, this manual process lacks automated synchronization or cutover, making it unsuitable for minimal downtime.
- C. Incorrect.
Incorrect. Using Data Transfer Appliance is a good option for bulk data, but it doesn�t automate the end-to-end migration of application VMs or handle incremental synchronization. You would still have to manually configure the application servers, which can be time-consuming and prone to errors.
- D. Incorrect.
Incorrect. Migrating only the database tier to an Autonomous Database disregards any necessary configurations for the application layer. Oracle Cloud Migrations does not automatically reconfigure the application tier when you leave it behind. This approach leaves critical application components out of scope.