Google Professional Cloud Database Engineer Question 37
Select 4Google Cloud PlatformYou are managing a Cloud SQL instance running PostgreSQL in a production environment. The database is currently on version 12, and you need to upgrade it to version 14 to leverage new features. The database serves live traffic, and downtime must be minimized. What steps should you take to plan and execute the upgrade?
- A
Test the upgrade process in a staging environment with a copy of the production database.
- B
Directly upgrade the Cloud SQL instance to version 14 using the Cloud Console or gcloud command.
- C
Schedule the upgrade during a maintenance window to minimize impact on users.
- D
Ensure that all application dependencies and client libraries are compatible with PostgreSQL version 14 before upgrading.
- E
Enable automatic backups to ensure you can restore the database in case of issues during the upgrade.
- F
Turn off database replication before starting the upgrade to avoid data inconsistency.
Show answer and explanation
Correct answers: A, C, D, E
Explanation
To ensure a successful upgrade of a Cloud SQL instance with minimal downtime, it is critical to thoroughly test the process in a staging environment, ensure application and client compatibility with the target version, and schedule the upgrade during a maintenance window. Enabling automatic backups adds an extra layer of safety in case unexpected issues arise during the upgrade. These steps align with best practices for planning and executing database upgrades in Google Cloud-managed environments.
- A. Correct.
Testing the upgrade process in a staging environment minimizes the risk of failures or issues during the upgrade in production. It ensures compatibility and smooth transition.
- B. Incorrect.
Directly upgrading the Cloud SQL instance without proper planning or testing can lead to downtime or compatibility issues, making this approach unsuitable for production environments.
- C. Correct.
Scheduling the upgrade during a maintenance window ensures minimal disruption to users, as the upgrade process may involve brief downtime or performance degradation.
- D. Correct.
Ensuring application dependencies and client libraries are compatible with the target database version is critical to prevent runtime errors post-upgrade.
- E. Correct.
Enabling automatic backups provides a safety net, allowing you to restore the database to its pre-upgrade state if something goes wrong.
- F. Incorrect.
Turning off database replication is not necessary for a version upgrade in Cloud SQL. Cloud SQL handles replication during upgrades in managed environments.