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Scalability vs Performance Two words that get thrown around interchangeably in every engineering meeting — and confusing them can quietly wreck your architecture decisions. This guide untangles scalability and performance from first principles, with analogies, Java code, and real production stories from Netflix, Amazon, and Uber. 01 · Introduction02 ·…
What Is Resilience in System Design? A complete, beginner-to-production walkthrough of building systems that bend without breaking — the concepts, the patterns, the math, and the real production practices behind resilient architecture. 01 · Intro & History 02 · Problem 03 · Core Concepts 04 · Architecture 05 · Internal…
A beginner-friendly, complete guide to relational vs NoSQL databases: what each one really is, how they store and scale data, the CAP theorem, ACID vs BASE, real-world architectures, and a practical decision checklist for picking the right database for your system.
What Is a Database Read Replica? A complete, beginner-friendly guide to one of the most important scaling patterns in modern software systems — explained from first principles, with real production examples from companies like Netflix, Amazon, and Uber. 01 · Introduction02 · The Problem03 · Core Concepts04 · Architecture05 ·…
A full-length guide to the primary key — history, B-tree internals, natural vs surrogate keys, composite keys, sharding, distributed IDs, security, caching, APIs, Java examples, and real-world lessons from Netflix, Amazon, Uber, Instagram, and Google.
A ground-up, beginner-friendly walkthrough of the two HTTP update methods everyone confuses — how they work internally, why idempotency matters, how JSON Patch and JSON Merge Patch differ, and how Netflix, Stripe, GitHub, and Kubernetes actually use them in production.
Public vs Private vs Hybrid Cloud A ground-up, beginner-friendly walkthrough of the three major cloud deployment models — what each one actually is, how it works underneath, when to reach for it, and how the world’s biggest companies run them in production. 01 · Intro & History 02 · Problem…
A complete guide to software profiling: what it is, how sampling and instrumentation differ, how flame graphs work, and how modern teams run continuous profiling in production across microservices and cloud fleets.
A complete, beginner-friendly, production-grade guide to database connection pooling: why opening a fresh database connection for every request is one of the most expensive mistakes in software engineering, and how connection pools quietly fix it inside almost every production system. Covers the full origin story from the 1990s Object Pool…
A complete, beginner-friendly, production-grade tutorial on polyglot persistence: why modern architects deliberately use many different databases in one system, when it is worth the added operational cost, and how it actually works. Covers the full history from Edgar Codd’s 1970s relational model through the NoSQL movement and the 2011 naming…