GCP - Cloud SQL and Databases
You want to design a highly available web application on GCP that remains online even if an entire zone fails. Which combination of configurations best achieves this?
You want to design a highly available web application on GCP that remains online even if an entire zone fails. Which combination of configurations best achieves this?
hard📝 Best Practice Q15 of 15
Step-by-Step Solution
Solution:
Step 1: Understand zone failure impact
A single zone failure can take down all instances in that zone if only single-zone is used.Step 2: Choose multi-zone MIG with health checks and autoscaling
This setup spreads instances across zones, replaces unhealthy ones, and adjusts capacity automatically.Step 3: Evaluate other options
Single-zone lacks zone failure protection; single VM is a single point of failure; storage bucket is not compute.Final Answer:
Multi-zone Managed Instance Group with health checks and autoscaling -> Option BQuick Check:
Multi-zone MIG + health checks + autoscaling = high availability [OK]
Quick Trick: Use multi-zone MIG with health checks and autoscaling for best availability [OK]
Common Mistakes:
- Choosing single-zone MIG ignoring zone failure
- Using single VM which is a single failure point
- Confusing storage bucket with compute resources
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