Multi-Region Deployment.
Deploy ABIS across multiple regions for global reach.
Multi-region deployment provides: latency optimization (serve users from nearest region), disaster recovery (survive region failure), and data residency compliance (keep data in required jurisdictions).
Challenges: data consistency across regions, cross-region failover complexity, and increased operational burden. Don't go multi-region unless you have clear requirements.
Design for eventual consistency. Synchronous cross-region replication adds latency; async replication is faster but creates consistency windows.
ACTIVE-ACTIVE
Both Regions Serve Traffic
Users route to nearest region. Both regions process requests independently.
ACTIVE-PASSIVE
Primary Serves, Secondary Waits
Primary region handles traffic. Secondary ready for failover.
FAILOVER
Secondary Promoted
Primary unavailable. Traffic routes to secondary region.