Category System Design

1. Overview This case study outlines a scalable, distributed web crawler architecture capable of processing billions of pages daily. It incorporates fault tolerance, politeness policies, and deduplication. The implementation leverages .NET 8 for high performance, with components for orchestration, fetching,…

1. Functional Requirements 2. Non-Functional Requirements 3. Estimation (Back-of-the-envelope) 4. High-Level Architecture Key Insight: 99%+ of traffic is GET /:shortCode → 301 redirect → Optimize the redirect path aggressively. 5. Core Design Decisions 5.1 Short Code Generation Strategy Option Chosen:…

Introduction Disaster Recovery (DR) and Backup Strategies are critical components of system design to ensure business continuity, data protection, and rapid recovery from catastrophic events such as hardware failures, cyberattacks, natural disasters, or human errors in distributed systems. In cloud-native microservices architectures, which…

Introduction Auditing and Compliance in system design involves implementing mechanisms to ensure that distributed systems adhere to regulatory standards such as the General Data Protection Regulation (GDPR), Health Insurance Portability and Accountability Act (HIPAA), System and Organization Controls 2 (SOC2), and Payment Card Industry Data…

Introduction Chaos Engineering is a disciplined approach to proactively testing the resilience of distributed systems by intentionally introducing controlled failures, such as service outages, network latency, or resource exhaustion, to identify weaknesses and improve fault tolerance. In cloud-native microservices architectures, where…

Introduction Zero Trust Architecture (ZTA) is a security model that assumes no trust within or outside a system, requiring continuous verification of every user, device, and request to ensure secure access and data protection. In the context of cloud-native microservices, ZTA…

Introduction Distributed tracing is a critical technique for debugging and understanding the behavior of distributed systems, particularly in microservices architectures, where requests traverse multiple services. It provides end-to-end visibility into request flows, enabling developers to identify bottlenecks, latency issues, and errors…

Introduction Monitoring and logging strategies are essential for maintaining the health, performance, and security of cloud-native microservices architectures, enabling high scalability (e.g., 1M req/s), availability (e.g., 99.999% uptime), and compliance with standards like GDPR, HIPAA, and PCI-DSS. These strategies provide visibility…

Introduction Microservices architectures enable scalable, flexible, and independent deployment of services, but they introduce unique security challenges due to their distributed nature. Ensuring robust security in microservices is critical for maintaining confidentiality, integrity, and availability in cloud-native applications such as e-commerce…