GCP - Cloud SQL and Databases
What will happen if you try to reduce the number of nodes in a Cloud Spanner multi-region instance below the minimum required for that configuration?
What will happen if you try to reduce the number of nodes in a Cloud Spanner multi-region instance below the minimum required for that configuration?
medium📝 service behavior Q5 of 15
Step-by-Step Solution
Solution:
Step 1: Recall node scaling rules for multi-region instances
Cloud Spanner enforces minimum nodes per configuration to maintain performance and availability.Step 2: Understand behavior on invalid scaling requests
Requests to reduce nodes below minimum are rejected with an error.Final Answer:
The request will fail with an error -> Option AQuick Check:
Scaling below minimum nodes = Request fails [OK]
Quick Trick: Cannot scale below minimum nodes; request is rejected [OK]
Common Mistakes:
- Assuming silent degradation occurs
- Thinking instance auto-switches modes
- Believing scaling always succeeds
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