1Z0-1072-25 Question 209
Single answerYou have a distributed application running on a single instance with three block volumes attached in Oracle Cloud Infrastructure (OCI). Each volume stores a different data subset for the application. You need to create a crash-consistent backup of all three volumes at the same point in time, ensuring they can be restored together if needed. Which approach should you use to achieve this goal?
- A
Create a separate on-demand backup for each volume using the OCI Console.
- B
Use a Volume Group that includes all three block volumes, then perform a Volume Group Backup.
- C
Deactivate write operations on each volume, then manually copy the data to an Object Storage bucket.
- D
Create individual clones of each volume and ensure the database is shut down before cloning.
Show answer and explanation
Correct answer: B
Explanation
Using a Volume Group in OCI automates the creation of synchronized backups for multiple block volumes, ensuring a single consistent restore point. This feature is particularly important for distributed applications that span multiple volumes. Refer to the Oracle Cloud Infrastructure Block Volume documentation to understand how Volume Groups and Volume Group Backups maintain crash consistency across related volumes.
- A. Incorrect.
Option 1 is incorrect: Creating separate on-demand backups for each volume individually does not guarantee a single crash-consistent point in time across all volumes. Each backup may be taken at slightly different times, leading to inconsistencies.
- B. Correct.
Option 2 is correct: Volume Group Backup allows you to include multiple volumes in a single, coordinated backup operation, providing a crash-consistent snapshot across all volumes in the group.
- C. Incorrect.
Option 3 is incorrect: Manually copying data to Object Storage requires application downtime or the risk of inconsistent data if the application continues to write to the volumes. This approach is not the recommended or automated way to achieve crash consistency.
- D. Incorrect.
Option 4 is incorrect: Cloning provides a point-in-time copy of a single volume, but it does not group multiple volumes into a single crash-consistent operation. Shutting down the database before cloning each volume could minimize data inconsistency, but it is not a consolidated backup solution.