Google Cloud Professional Cloud Database Engineer — Question 116

Your organization is running a critical production database on a virtual machine (VM) on Compute Engine. The VM has an ext4-formatted persistent disk for data files. The database will soon run out of storage space. You need to implement a solution that avoids downtime. What should you do?

Answer options

• A. In the Google Cloud Console, increase the size of the persistent disk, and use the resize2fs command to extend the disk.
• B. In the Google Cloud Console, increase the size of the persistent disk, and use the fdisk command to verify that the new space is ready to use
• C. In the Google Cloud Console, create a snapshot of the persistent disk, restore the snapshot to a new larger disk, unmount the old disk, mount the new disk, and restart the database service.
• D. In the Google Cloud Console, create a new persistent disk attached to the VM, and configure the database service to move the files to the new disk.

Correct answer: A

Explanation

Option A is correct because increasing the size of the persistent disk in the Google Cloud Console and then using the resize2fs command allows for the disk to be extended without requiring downtime. Option B is incorrect as fdisk is not necessary for this process and does not extend the filesystem. Option C involves multiple steps that create downtime, while Option D requires moving files to a new disk, which is also more complex and can lead to service interruption.