1Z0-1123-25 Question 106
Single answerYou manage a multi-tier application deployed in the Phoenix region on OCI. Each compute instance was provisioned from a custom VM image, and mission-critical application data resides on attached OCI Block Volumes. To support users in the eastern US, you must stand up an equivalent environment in the Ashburn region with minimal downtime and minimal manual reconfiguration. Which approach should you use to create the new environment in Ashburn?
- A
Create Block Volume backups in Phoenix, copy the custom VM images across regions, and then restore every component in Ashburn to replicate the environment accurately.
- B
Leverage a single-step, built-in feature to replicate your entire compartment�including all instances and volumes�from Phoenix to Ashburn with no downtime.
- C
Deploy a new environment in Ashburn using default images and ephemeral storage, then manually migrate application data from on-premises backups.
- D
Take offline snapshots of running compute instances in Phoenix, upload them as new custom images to Ashburn, and boot directly from these images to replicate the infrastructure.
Show answer and explanation
Correct answer: A
Explanation
Replicating custom VM images to the target OCI region and restoring data from Block Volume backups ensures an accurate copy of your environment with minimal downtime. Oracle documentation recommends using image export/import or cross-region copy for images, and block volume backups for data. For more details, see the OCI documentation on 'Migrating Resources to a Different Region' and 'Backing Up and Restoring Block Volumes.'
- A. Correct.
Correct. Using Block Volume backups copied to the target region, along with cross-region copy of your custom VM images, is the recommended approach for replicating the same configurations. By restoring the copies in Ashburn, you ensure that your instances and data match your Phoenix environment with minimal manual steps and downtime.
- B. Incorrect.
Incorrect. There is no single-step OCI feature that automatically replicates an entire compartment with zero downtime. You typically need to handle image replication, volume backups, and other resource configurations separately.
- C. Incorrect.
Incorrect. Rebuilding the environment from scratch on default images and ephemeral storage introduces significant manual overhead and increases the risk of configuration errors. It also fails to capture the exact VM image setup you had in Phoenix.
- D. Incorrect.
Incorrect. While you can snapshot and convert images, simply taking offline snapshots of running instances and uploading them directly to another region is neither fully supported nor efficient. It does not address the need to replicate Block Volumes properly and can result in inconsistencies.