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You want to deploy a Cloud Spanner instance that serves users in Asia, Europe, and North America with low latency. Which configuration should you choose?

hard📝 Best Practice Q15 of 15
GCP - Cloud SQL and Databases
You want to deploy a Cloud Spanner instance that serves users in Asia, Europe, and North America with low latency. Which configuration should you choose?
AUse a single-region config in Asia with 5 nodes.
BUse the multi-region config "nam-eur-asia1" with enough nodes.
CUse multiple single-region instances in each continent.
DUse the multi-region config "nam3" with 3 nodes.
Step-by-Step Solution
Solution:
  1. Step 1: Identify multi-region config covering Asia, Europe, North America

    "nam-eur-asia1" is a multi-region config spanning these continents.
  2. Step 2: Understand node allocation

    Choosing enough nodes ensures capacity and low latency across regions.
  3. Step 3: Compare other options

    Single-region configs or multiple instances increase complexity or limit coverage.
  4. Final Answer:

    Use the multi-region config "nam-eur-asia1" with enough nodes. -> Option B
  5. Quick Check:

    nam-eur-asia1 covers all needed continents [OK]
Quick Trick: Pick multi-region config covering all user continents [OK]
Common Mistakes:
  • Choosing single-region config for global users
  • Using nam3 which excludes Europe and Asia
  • Deploying multiple instances instead of one multi-region

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