Easy Learn
A complete, beginner-friendly walkthrough of the Unified Modeling Language — the standardised visual notation that architects use to draw software the same way structural engineers draw buildings. Opens with a multi-country bridge-building analogy: without shared blueprint symbols, one engineer’s triangle means “support beam” and another’s means “danger, avoid.” UML fixes…
A plain-language, beginner-to-architect walkthrough of the CAP theorem: what Consistency, Availability, and Partition tolerance actually mean; why the trade-off is unavoidable during network partitions; how CP systems (HBase, Spanner, ZooKeeper, etcd) differ from AP systems (Cassandra, DynamoDB, Couchbase, Riak); how CAP relates to ACID and BASE; how the extended PACELC…
A complete, beginner-friendly walkthrough of the API contract — the formal, machine-readable agreement that lets a provider and its consumers keep working together reliably even as both sides keep changing. Opens with a drive-through analogy: the fixed window, the menu board, and the agreed order of steps between customer and…
A beginner-friendly, production-grade deep dive into ACID – the four guarantees (Atomicity, Consistency, Isolation, Durability) that keep bank balances, shopping carts, and ticketing systems from silently corrupting. Covers the mobile-banking analogy that motivates the whole idea, then walks through the full history of ACID from Codd’s relational model in 1970,…
A complete guide to the two most confused HTTP status codes: 401 Unauthorized (who are you?) vs 403 Forbidden (what are you allowed to do?). Covers RFC 7235, the two-gate model, WWW-Authenticate, JWT anatomy, OAuth 2.0 flow, Spring Security filter examples, microservices split of coarse authentication at the gateway vs…
A ground-up walkthrough of virtual machines: the history from IBM mainframes and VMware to AWS Nitro and Google Compute Engine; hypervisor internals (VT-x/AMD-V, trap-and-emulate, nested paging, VirtIO, SR-IOV); the VM lifecycle, live migration, snapshots and multi-AZ HA; security and multi-tenancy; monitoring metrics like CPU Ready Time and ballooning; cloud deployment…
A ground-up, beginner-to-production guide to blue-green deployment: the history from Humble and Farley’s Continuous Delivery to modern cloud platforms, the architecture and control-loop mechanics, connection draining and warm-up, expand/contract database migrations, monitoring and automated rollback triggers, cloud implementations on AWS, Azure, GCP and Kubernetes, and real-world examples from Netflix, Amazon,…
A ground-up walkthrough of auto-scaling: the history from mid-1990s data-centre capacity planning to EC2, Kubernetes HPA and predictive ML-based scaling; the architecture, control-loop math, and code samples that make it work; cloud implementations across AWS, GCP, Azure and Kubernetes; the distributed-systems trade-offs (CAP, consensus, sharding, replication) that show up at…
A ground-up walkthrough of the automated backbone that carries source code to a live production system: history from Grady Booch’s 1991 continuous integration to today’s GitHub Actions and Argo CD, plus the architecture, stages, code samples, and industry examples from Netflix, Amazon, Google, Etsy, Uber and Spotify.
A beginner-friendly, ground-up walkthrough of canary deployment — the release strategy that Netflix, Google, Amazon, Meta, Uber and Etsy use to roll out software to millions of real users without breaking anything. Opens with the cupcake and coal-mine analogies, traces the history from Google’s SRE book and Netflix’s Spinnaker (2015)…