https://chiraghasija.cc/tags/system-design/ Recent content in System Design on Chirag Hasija https://chiraghasija.cc/og-image.png https://chiraghasija.cc/og-image.png Hugo -- 0.155.3 en-us Sat, 14 Mar 2026 22:00:00 +0530 https://chiraghasija.cc/posts/real-cost-running-production-systems/ Sat, 14 Mar 2026 22:00:00 +0530 https://chiraghasija.cc/posts/real-cost-running-production-systems/ The true cost of running production systems goes far beyond your AWS bill. A practical breakdown of infrastructure, operational, database, and hidden costs - with deep dives into each category. https://chiraghasija.cc/posts/postgresql-is-all-you-need/ Sat, 14 Mar 2026 21:00:00 +0530 https://chiraghasija.cc/posts/postgresql-is-all-you-need/ PostgreSQL handles 90% of what startups need - OLTP, JSON, full-text search, time series, and more. Here is a practical map of what Postgres covers natively, when to add Redis, and when you genuinely need something else. https://chiraghasija.cc/posts/system-design-roadmap-what-to-learn/ Sat, 14 Mar 2026 20:00:00 +0530 https://chiraghasija.cc/posts/system-design-roadmap-what-to-learn/ A structured system design learning roadmap broken into 7 phases - from fundamentals to infrastructure. Stop studying topics randomly and follow this order instead. https://chiraghasija.cc/posts/chatgpt-api-integration-complete-guide/ Sat, 14 Mar 2026 18:00:00 +0530 https://chiraghasija.cc/posts/chatgpt-api-integration-complete-guide/ A practical guide to integrating the ChatGPT API - from your first API call to streaming, function calling, cost optimization, and production architecture. https://chiraghasija.cc/posts/redis-single-threaded-to-io-threads/ Sat, 14 Mar 2026 16:00:00 +0530 https://chiraghasija.cc/posts/redis-single-threaded-to-io-threads/ The full story of how Redis evolved from a single-threaded event loop to IO threads hitting 3.5M ops/sec - and why it still refuses to go fully multi-threaded. https://chiraghasija.cc/posts/redis-internals-clustering-sentinel-pipelining/ Sat, 14 Mar 2026 14:00:00 +0530 https://chiraghasija.cc/posts/redis-internals-clustering-sentinel-pipelining/ A practical deep dive into Redis clustering, sentinel, sharding, and pipelining - with real numbers, architecture diagrams, and a decision framework for picking the right setup. https://chiraghasija.cc/posts/database-ops-per-second-when-to-shard/ Sat, 14 Mar 2026 12:00:00 +0530 https://chiraghasija.cc/posts/database-ops-per-second-when-to-shard/ Real-world ops/sec, memory limits, and single-node ceilings for PostgreSQL, Redis, MongoDB, DynamoDB, and Cassandra - with a practical framework for when sharding actually makes sense. https://chiraghasija.cc/posts/polling-vs-long-polling-vs-websockets/ Sat, 14 Mar 2026 10:00:00 +0530 https://chiraghasija.cc/posts/polling-vs-long-polling-vs-websockets/ A practical breakdown of polling, long polling, and WebSockets - with real examples, tradeoffs, and a decision framework for system design. https://chiraghasija.cc/posts/system-design-interview-structure/ Sun, 22 Feb 2026 12:00:00 +0530 https://chiraghasija.cc/posts/system-design-interview-structure/ A complete guide to structuring a 45-minute system design interview. The exact phases, order, time allocation, and what interviewers expect at each stage. https://chiraghasija.cc/posts/back-of-envelope-calculation-system-design/ Thu, 19 Feb 2026 12:00:00 +0530 https://chiraghasija.cc/posts/back-of-envelope-calculation-system-design/ A practical guide to back-of-envelope calculations in system design. Quick estimation techniques, reference numbers, worked examples, and common mistakes to avoid. https://chiraghasija.cc/posts/non-functional-requirements-system-design/ Thu, 19 Feb 2026 11:00:00 +0530 https://chiraghasija.cc/posts/non-functional-requirements-system-design/ A senior engineer's guide to defining non-functional requirements in system design interviews. Go beyond 'scalable and available' with a framework, worked examples, and a checklist. https://chiraghasija.cc/posts/functional-requirements-system-design/ Thu, 19 Feb 2026 10:00:00 +0530 https://chiraghasija.cc/posts/functional-requirements-system-design/ A senior engineer's guide to listing functional requirements in system design interviews. Framework, examples, anti-patterns, and a ready-to-use checklist. https://chiraghasija.cc/posts/sql-vs-nosql/ Mon, 16 Feb 2026 12:00:00 +0530 https://chiraghasija.cc/posts/sql-vs-nosql/ SQL vs NoSQL - real trade-offs, real examples, and a decision framework to confidently pick the right database for any project.