Exam Professional Cloud Database Engineer topic 1 question 79 discussion

Changing my vote to A

Cloud Spanner is designed to scale globally, making it ideal for applications that will grow to millions of users across different regions.

multi-regional

Voting for A

https://cloud.google.com/spanner/docs/instance-configurations#move-instance You can move your Spanner instance from any instance configuration to any other instance configuration, including between regional and multi-region configurations. Moving your instance does not cause downtime, and Spanner continues to provide the usual transaction guarantees, including strong consistency, during the move.

https://cloud.google.com/spanner/docs/instance-configurations#move-instance You can move your Spanner instance from any instance configuration to any other instance configuration, including between regional and multi-region configurations. Moving your instance does not cause downtime, and Spanner continues to provide the usual transaction guarantees, including strong consistency, during the move. https://cloud.google.com/spanner/docs/move-instance https://cloud.google.com/spanner/docs/move-instance#how-instance-move

Going with B because - Small pilot in one "country". A country would be multiple regions - Don't have to change to multi-region spanner in the future. - Q doesn't say anything about being cost-efficient so might as well start with multi-region.

correct answer is B. Use Cloud Spanner in a multi-region configuration.

A. Initially it’s a choice between Cloud SQL and Cloud Spanner. Given the final objective is a massive user base on a global scale, it suggests Spanner. Therefore, starting with Cloud SQL then migrating to Cloud Spanner doesn’t seem like a smart move. Eliminate C and D. You can start small with Spanner (single region, 100 processing units) and convert to multi-region by contacting Google. The wording to that effect is on the Edit Spanner screen in the GCP console. So, given those details it eliminates B. Best answer is A.

"You plan to start with a small pilot in one country" == small spanner ==> regional.

You plan to start with a small pilot in one country. so country is multi region right? so B ?

I'll go for B

B: Use high availability (HA) *** Cloud SQL with multiple zones.