Exam Associate Cloud Engineer topic 1 question 234 discussion

Answer is D. When your are using regional persistent disks, the data is automatically replicated to two replicas without the requirement of maintaining application replication. There is no need to use a snapshot.

Answer is C and not D. Use regional PD with regular snapshot for data redundancy. C works, but data will be stale, as there is no latest snapshot. A&B are out, as they are using regular PD and not regional PD.

Option C provides the best combination of data redundancy and recovery speed, making it the ideal choice for high-availability scenarios. While other options like option A (zonal persistent disk with snapshots) or option D (regional disk with instances in other zones) can also work, they may not offer the same level of efficiency and data protection as option C. Option B (zonal disk without replication) is less desirable because it lacks data redundancy and necessitates manual intervention to restore data in case of a zonal failure.

I thought first it was C. Then i saw Google documentation and for sure the answer is D.

D is the correct answer

C, If you are designing robust systems or high availability services on Compute Engine, use regional Persistent Disk combined with other best practices such as backing up your data using snapshots.

It should be D.

D, C doesn't make sense because article explicitly says that: 'During the failover, the regional persistent disk that is synchronously replicated to the secondary zone is force attached to the standby VM by the application control plane, and all traffic is directed to that VM based on health check signals.' https://cloud.google.com/compute/docs/disks/high-availability-regional-persistent-disk#failover

The benefit of regional persistent disks is that in the event of a zonal outage, where your virtual machine (VM) instance might become unavailable, you can usually force attach a regional persistent disk to a VM instance in a secondary zone in the same region.

https://cloud.google.com/compute/docs/disks/high-availability-regional-persistent-disk

CHATGPT says C

correct: C

It should be C.

I think c, for high availability use regional instead of zonal, and you can create snapshot to protect against data loss https://cloud.google.com/compute/docs/disks#reliability_2:~:text=Similar%20to%20zonal%20Persistent%20Disk%2C%20you%20can%20create%20snapshots%20of%20Persistent%20Disk%20to%20protect%20against%20data%20loss%20due%20to%20user%20error.%20Snapshots%20are%20incremental%2C%20and%20take%20only%20minutes%20to%20create%20even%20if%20you%20snapshot%20disks%20that%20are%20attached%20to%20running%20instances.

Chat Gpt sayd "D"