Day 61: Circuit Breakers - Your System's Safety Net

254-Day Hands-On System Design Series | Module 2: Scalable Log ProcessingWeek 9: High Availability and Fault Tolerance

🎯 What We're Building Today

High-Level Agenda:

• Intelligent Circuit Breaker Engine: Three-state machine (CLOSED/OPEN/HALF-OPEN) with automatic failure detection

• Protected Service Layer: Database, message queue, and external API services with circuit breaker protection

• Real-time Monitoring Dashboard: WebSocket-powered interface with live metrics and testing controls

• Graceful Degradation System: Fallback mechanisms and recovery detection

• Production Testing Framework: Failure simulation, load testing, and comprehensive validation

By lesson's end, you'll have: A bulletproof log processing system that prevents cascading failures and maintains availability during component outages.

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