Oracle Cloud Infrastructure 2020 Architect Professional — Question 37

You are running a legacy application in a compute instance on Oracle Cloud Infrastructure (OCI). To provide enough space for it to store internal data, a block volume is attached to the instance in paravirtualized mode.
Your application is not resilient to crash-consistent backup.
What should you do to backup the block volume in a secure and cost effective way? (Choose the best answer.)

Answer options

• A. Save your application data, detach the block volume and create a clone.
• B. Create a volume group, add the boot volume and then run the volume group backup.
• C. Create a backup, detach the block volume and save your application data.
• D. Save your application data, detach the block volume and create a backup.

Correct answer: D

Explanation

The correct answer is D because it ensures that the application data is saved before detaching the block volume, thus maintaining data integrity. Option A is incorrect as cloning does not guarantee the safety of the data unless it is saved first. Option B is not applicable since it involves a volume group and the boot volume, which are not necessary for backing up a single block volume. Option C is incorrect because it suggests backing up the block volume before detaching it, which may leave the backup in a crash-consistent state.