georedundantie

Georedundantie is in IT and digital infrastructure the strategy of duplicating data, applications, and services across multiple geographically separated locations to increase availability, durability, and disaster recovery capability. It aims to minimize the chance that a regional incident completely disables a system.

It covers two main aspects: data georedundantie, which involves replication of storage contents across regions to prevent data loss and provide local read access, and service georedundantie, which distributes active services across locations to maintain operation during outages and reduce latency.

Implementation options include synchronous replication, where changes are committed at all sites before acknowledging success, reducing RPO but increasing latency; and asynchronous replication, which trades some RPO for lower latency. Architectures can be active-active, where multiple sites serve traffic concurrently, or active-passive, where a primary site handles traffic and others stand by. Considerations include consistency models, latency, cost, regulatory constraints, and network reliability.

Challenges include data sovereignty and privacy laws, cross-border data transfer rules, synchronization complexity, and disaster-recovery testing. It also requires robust DNS or global load balancing, failover automation, and regular readiness drills.

Use cases include cloud storage with cross-region replication, databases with geo-replication, content delivery networks delivering content from edge locations, and critical online services that require rapid recovery after regional failures.