Hands On System Design - Distributed Systems Implementation

Hands On System Design - Distributed Systems Implementation

Day 59: Building Bulletproof Log Processing with Active-Passive Failover

Week 9: High Availability and Fault Tolerance | Module 2: Scalable Log Processing

Jul 09, 2025
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🎯 What We're Building Today

High-Level Agenda:

  • Heartbeat Monitoring System - 2-second interval failure detection

  • Automatic Failover Controller - Leadership election with consensus

  • State Synchronization - Redis-backed persistence across nodes

  • Health Check Integration - Load balancer compatibility

  • Real-Time Dashboard - React-based monitoring interface

  • Chaos Engineering Tests - Production resilience validation

Expected Outcome: Zero-downtime failover system completing transitions in under 10 seconds with 99.9% availability guarantee.


🏗️ System Architecture Overview

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