Cloud Architecture

Multi-Region Active-Active with Cloud Spanner

Cloud Architecture diagram · made in Skemio

Multi-region architecture diagram with Global Load Balancer sending traffic to US and EU application tiers connected to Cloud Spanner and TrueTime.
Multi-region architecture diagram with Global Load Balancer sending traffic to US and EU application tiers connected to Cloud Spanner and TrueTime.
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What it shows

  • TrueTime API uses atomic clocks and GPS to guarantee external consistency.
  • Paxos distributed consensus replicates writes across regional quorums.
  • Read-only replicas serve localized queries with near-zero cross-region latency.

The takeaway

Cloud Spanner solves the CAP theorem trade-off with hardware-assisted distributed transactions.

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