[Phase 10] High Availability - Clustering & Replication

[ravituringworks]

Phase 10: Production Readiness

Overview

Implement high availability features including clustering and replication for production deployments.

Features to Implement

• Master-slave replication with automatic failover
• Multi-master clustering for write scalability
• Consensus-based leader election (Raft/etcd integration)
• Data synchronization across cluster nodes
• Split-brain prevention and network partition handling
• Rolling upgrades with zero downtime

Technical Requirements

• Integration with existing etcd-based clustering
• Replication log streaming and synchronization
• Conflict resolution for multi-master setups
• Health monitoring and automatic failover
• Load balancing for read/write operations
• Network partition detection and handling

Success Criteria

• 99.9% uptime with automatic failover
• Data consistency across all replicas
• Zero-downtime rolling upgrades
• Automatic recovery from node failures
• Read scalability with multiple replicas
• Write scalability with multi-master clustering

Dependencies

• Existing etcd clustering infrastructure
• Transaction coordination system
• Network layer with health monitoring
• Load balancing capabilities

Estimated Effort

6-8 weeks