Leader-Based Replication
Leader-based replication is a data replication strategy in distributed systems where one node (the leader or primary) handles all write operations and propagates changes to other nodes (followers or replicas). This ensures consistency by having a single source of truth for writes, while followers serve read requests to improve scalability and fault tolerance. It is commonly used in databases and distributed storage systems to maintain data availability and durability.
Developers should learn leader-based replication when building or managing distributed systems that require strong consistency, high availability, and fault tolerance, such as in financial applications or real-time data processing. It is particularly useful in scenarios where write operations must be serialized to avoid conflicts, and read scalability is needed through multiple replicas. Understanding this concept helps in designing reliable systems that can handle node failures without data loss.