Understanding Database Synchronization
Database synchronization ensures that multiple databases stay consistent with each other. This is critical for distributed systems, disaster recovery, and multi-region deployments.
Common Database Sync Challenges
- Consistency issues: Keeping multiple databases in sync is complex
- Latency problems: Real-time sync across regions is difficult
- Data conflicts: Handling conflicting updates from multiple sources
- Scaling concerns: Sync performance degrades with scale
Key Synchronization Patterns
1. Master-Slave Replication
One master database distributes changes to slave replicas.
2. Master-Master Replication
Multiple masters replicate to each other bidirectionally.
3. Log-Based CDC (Change Data Capture)
Capture database changes and propagate them to other systems.
Implementation Best Practices
✅ Use transactional consistency levels
✅ Implement conflict resolution strategies
✅ Monitor replication lag
✅ Design for idempotent operations
✅ Test failover scenarios
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