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🧩 Multi-region Architecture

Multi-region Architecture is a topology that deploys services to multiple regions and satisfies availability, latency, and disaster recovery simultaneously.

✅ Overview​

Deploys applications and data to multiple regions and operates in Active-active / Active-passive configuration.

✅ Problems Addressed​

  • Total outage due to single region failure.
  • High latency for global users.
  • Delay in Disaster Recovery (DR) / Failover.
  • Balancing data consistency and scale.

✅ Basic Philosophy & Structure​

  • Routes users to optimal region by Global Load Balancing.
  • Select Strong / Eventual Consistency.
  • Decide configuration according to RPO/RTO requirements.

✅ Representative Configuration Patterns​

● Active-active​

  • All regions operate simultaneously.
  • High availability / Low latency.
  • Design of data consistency is difficult.

● Active-passive​

  • One side stands by and switches at failure.
  • Simple and predictable.
  • Takes time for failover.

❌ Unsuitable Cases​

  • Apps centered on single DB where strong consistency cannot be broken absolutely.
  • Scale that cannot absorb inter-region communication cost.

✅ Related Styles​

✅ Summary​

Multi-region Architecture is a configuration essential for global services, realizing availability, disaster tolerance, and latency improvement at a high level.