Practice Test 3 | Google Cloud Certified Professional Cloud Architect | Dumps | Mock Test
A production database virtual machine on Google Compute Engine has an ext4-formatted persistent disk for data files. The database is about to run out of storage space. How can you remediate the problem with the least amount of downtime?
A. In the Cloud Platform Console, increase the size of the persistent disk and use the resize2fs command in Linux.
B. Shut down the virtual machine, use the Cloud Platform Console to increase the persistent disk size, then restart the virtual machine.
C. In the Cloud Platform Console, increase the size of the persistent disk and verify the new space is ready to use with the fdisk command in Linux.
D. In the Cloud Platform Console, create a new persistent disk attached to the virtual machine, format and mount it, and configure the database service to move the files to the new disk.
E. In the Cloud Platform 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.
Correct Answer A
Explanation
Answers B (Shut down VM), D (Move files to new attached disk), and E (Use snapshot to restore … restart the database service) all have some sorts of downtime, so they can be ruled out.
A (Correct answer) – In the Cloud Platform Console, increase the size of the persistent disk and use the resize2fs command in Linux.
You can resize persistent disks when your instances require more storage space and attach multiple secondary disks only when you need to separate your data into unique partitions. You can resize disks at any time, regardless of whether the disk is attached to a running instance.
You can use console or command line to resize the disk:
gcloud compute disks resize [DISK_NAME] –size [DISK_SIZE]
After you resize your persistent disk, you must configure the file system on the disk to use the additional disk space. If the disk has a partition table, such as a boot disk, you must grow the partition and resize the file system on that partition. If your persistent disk has only a file system and no partition table, you can just resize the file system.
Extend the file system on the disk or the partition to use the added space. If you grew a partition on your disk, specify the partition. If your disk does not have a partition table, specify only the disk ID. The resize2fs is Linux program to resize ext2, ext3, or ext4 file systems.
sudo resize2fs /dev/[DEVICE_ID][PARTITION_NUMBER]
C – In the Cloud Platform Console, increase the size of the persistent disk and verify the new space is ready to use with the fdisk command in Linux.
This answer is incomplete: after indicating size increase in console, to make the new size effective, you have two options: restart the VM or configure (Grow partition if needed and expand partition/file system) in the VM’s operating systems, windows or linux
Reference Resources
https://cloud.google.com/compute/docs/disks/add-persistent-disk Adding or Resizing Persistent Disks
Additional Resource
Update: Now you have the option to enable “Automatic storage increase”
Instance Settings https://cloud.google.com/sql/docs/mysql/instance-settings#automatic-storage-increase-2ndgen
Automatic storage increase
If this setting is enabled, your available storage is checked every 30 seconds. If available storage falls below a threshold size, additional storage capacity is automatically added to your instance.
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