Connecting Developers to Architectural Excellence
Connecting Developers to Architectural Excellence
1. Overview A scalable notification service is a critical backend component for modern applications, responsible for delivering timely, personalized messages to users across multiple channels (push notifications, email, SMS, in-app, WhatsApp, etc.). This system powers user engagement in products like…
1. Overview A distributed job scheduler is a system that reliably executes tasks (jobs) at specified times or intervals across a cluster of machines. It powers background processing in virtually every large-scale application: cron jobs, ETL pipelines, report generation, cache…
Amazon Web Services (AWS) and Google Cloud announced a groundbreaking, jointly engineered multicloud networking solution in late November 2025, currently available in public preview. This service delivers managed, private, high-bandwidth connectivity between the two clouds in minutes, eliminating the weeks…
1. Overview A distributed rate limiter is a critical infrastructure component that enforces per-entity request quotas across a fleet of stateless application servers (e.g., microservices behind a load balancer). In a single-node system, rate limiting is trivial (in-memory counter), but…
1. Overview This case study presents a comprehensive design for a fully distributed, highly available, and linearly scalable key-value store, directly modeled after Amazon’s Dynamo technology (the foundational system behind DynamoDB, Riak, Cassandra, and Voldemort). The core philosophy is radical…
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:…
Abstract In the realm of distributed systems, achieving horizontal scalability while maintaining the reliability of a battle-tested relational database like MySQL presents formidable challenges. YouTube, the world’s premier video-sharing platform, exemplifies this triumph through its development of Vitess—an open-source database…
In the domain of e-commerce transaction processing, a reliable workload is characterized by its ability to consistently fulfill predefined reliability objectives, such as ensuring seamless order placement, payment authorization, and inventory updates without interruption. This reliability is achieved through proactive…