1Z0-1072-25 Question 204
Select 2You have a critical analytics workload running on a Compute instance in the Ashburn region� AD1. The instance uses a 500 GB block volume for data. You need to migrate this environment to AD2 for high availability and also expand the block volume to 1 TB, all with minimal downtime. Which two actions must you perform to meet these requirements?
- A
Create a volume backup from the existing block volume, then restore the backup in AD2 to create a new block volume
- B
Stop the Compute instance in AD1 to perform offline resizing of the block volume before migrating
- C
Use the online volume resizing feature from the OCI console to expand the existing block volume capacity without detaching
- D
Create a volume group backup for both boot and block volumes, then restore the group in AD2
- E
Set up a cross-region replication policy to synchronize block volumes between AD1 and AD2 in the same region
Show answer and explanation
Correct answers: C, D
Explanation
To replicate a running environment across availability domains while minimizing downtime, you must use features that reduce or eliminate the need to power down instances. Oracle Cloud Infrastructure supports online block volume resizing, so you can expand a volume without stopping the instance (Option 3). To replicate both the boot and block volumes seamlessly, a volume group backup transferred to another AD preserves the entire environment in one step (Option 4). For detailed guidance, refer to OCI Block Volume and Volume Group Backup documentation in the Oracle Cloud Infrastructure guides.
- A. Incorrect.
Option 1: Although creating a volume backup and restoring it in AD2 can work for just the data volume, it does not address the boot volume or the minimal downtime requirement if you also need an exact copy of the OS environment. Also, you would need to handle the boot volume separately to fully replicate the environment.
- B. Incorrect.
Option 2: Stopping the Compute instance to perform offline resizing causes downtime, which contradicts the requirement to minimize downtime. While offline resizing is a valid approach in some scenarios, Oracle Cloud Infrastructure supports online resizing for block volumes, making this option unnecessary for minimal downtime scenarios.
- C. Correct.
Option 3 (Correct): Using the online volume resizing feature allows you to expand your block volume from 500 GB to 1 TB without detaching it from the running instance. This meets the requirement for minimal downtime.
- D. Correct.
Option 4 (Correct): Creating a volume group backup that includes both boot and block volumes allows you to restore the entire environment in AD2 in one operation. This approach ensures that your OS and data are in sync and simplifies migration compared to individually backing up boot and block volumes.
- E. Incorrect.
Option 5: Cross-region replication is designed for automatically replicating block volumes across different regions, not between availability domains within the same region. Therefore, this does not meet the requirement to migrate from AD1 to AD2 in the Ashburn region.