Curriculum Modulesmodule-17Stateful Data Replication Across Geographic Regions

Stateful Data Replication Across Geographic Regions

Stateless microservices are easy to scale globally. Stateful data is where the true challenge lies.

The CAP Theorem

You cannot have Consistency, Availability, and Partition Tolerance simultaneously. Global systems must often sacrifice strong consistency for high availability (eventual consistency).

Replication Strategies

  • Synchronous Replication: Guarantees zero data loss but introduces significant latency across regions.
  • Asynchronous Replication: Fast, but risks data loss during an abrupt failover.

Conflict Resolution

In Active-Active multi-master setups, data can be modified simultaneously in different regions. We will cover CRDTs (Conflict-Free Replicated Data Types) and timestamp-based resolution mechanisms.

Active-Active and Active-Passive Failover StrategiesReadme