Difference between Synchronous Replication and Semi-Synchronous Replication
Below are the differences between Synchronous Replication and Semi-Synchronous Replication:
| Feature | Synchronous Replication | Semi-Synchronous Replication |
|---|---|---|
| Data Consistency | Strong, data is always up-to-date | Strong for critical data, slightly delayed for non-critical data |
| Performance Impact | Higher, as it waits for replica acknowledgment | Lower, as it only waits for one replica acknowledgment |
| Resource Usage | Higher, due to waiting for acknowledgment | Moderate, as only one replica needs acknowledgment |
| Complexity | Higher, due to managing real-time updates | Moderate, requires coordination of updates |
| Data Loss Risk | Lower, changes are applied in real-time | Moderate, slight delay in some updates |
Configurations of Database Replication in System Design
Database replication is a critical aspect of system design, providing redundancy, scalability, and fault tolerance. Modes or configurations of database replication define how data is replicated between a primary database and its replicas. Understanding these modes is essential for designing robust and efficient replication systems that meet the needs of modern applications.
Important Topics for the Configurations of Database Replication
- Synchronous replication
- Asynchronous replication
- Semi-synchronous replication
- Difference between Synchronous Replication and Semi-Synchronous Replication
- What Factors to consider when choosing a Replication Configuration?
Database replication can be configured and operated in different modes or configurations to achieve specific goals related to data consistency, availability, and performance.