Easy Learn
A ground-up tutorial covering both the data warehouse and the data lake, side by side. From Bill Inmon coining “data warehouse” in 1988 to James Dixon coining “data lake” in 2010, through schema-on-write vs schema-on-read, ETL vs ELT, star / snowflake schemas, columnar storage, medallion (Bronze / Silver / Gold)…
A complete, beginner-to-production walkthrough of why every well-built login system stores password hashes instead of encrypted passwords: the 1962 MIT CTSS printer incident, Robert Morris Sr.’s 1970s Unix crypt-with-salt scheme, and the timeline through bcrypt (1999), PBKDF2 (2000), scrypt (2009), and Argon2id’s 2015 Password Hashing Competition win; the core motivation…
A beginner-friendly, deep-dive guide to Continuous Deployment: the history from Extreme Programming and Flickr’s “10+ Deploys a Day” to Amazon’s 11.7-seconds-between-deploys statistic; how CD differs from Continuous Integration and Continuous Delivery; the architecture of a modern CD pipeline; canary releases, blue-green, feature flags and automated rollback; DORA metrics; GitOps with…
A beginner-to-production deep dive into the two most confused terms in modern software delivery — what Continuous Delivery and Continuous Deployment really mean, how the pipelines work inside, the trade-offs, and how organisations like Netflix, Amazon, Etsy and Google ship code hundreds of times a day with automated rollback safety nets.
A complete, beginner-to-production guide to connection timeouts: what they are, why every networked system needs them, and how they turn “wait forever” into a deliberate, bounded engineering decision. Traces the history from 1970s ARPANET and Vint Cerf and Bob Kahn’s 1974 TCP paper through the modern era where Netflix, Amazon,…
A container is a sealed box for software; a container registry is the warehouse that stores, versions, signs, scans, and serves those boxes to every environment that runs them. This complete guide walks through the history of containers, the OCI Distribution Spec, layers and digests, the split between metadata store…
A complete, beginner-to-production guide to Cross-Site Request Forgery (CSRF): the bank-tab origin story, Peter Watkins coining the term around 2001, and the timeline from Netscape’s 1994 cookie introduction through the 2006-2007 Netflix, YouTube, and Gmail disclosures to today’s SameSite-by-default browsers; the confused-deputy problem separating authentication from intent; ten core concepts…
A complete, beginner-to-production guide to data warehousing: what it is, why companies build them, and how they turn scattered raw data into fast, trustworthy answers. Traces the history from 1970s isolated systems through IBM’s 1988 foundational paper and the Inmon vs. Kimball debate, into the era of Teradata appliances, cloud…
Data outlives code — every framework retires, every team reorganizes, but the data those systems produced keeps flowing for decades. This complete guide explains why a Software Architect (not just a Data Architect) must deliberately design the data layer — covering history, core vocabulary, architectural components, the six-stage lifecycle, CAP-theorem…
A complete, book-quality walkthrough of database indexes: the librarian-card-catalog origin and short history from Bayer & McCreight’s 1970 B-Tree through today’s B+Tree, hash, bitmap, inverted, spatial and vector indexes; the O(n) vs O(log n) motivation showing an 8-second vs 2-millisecond query gap on 10 million rows with real-world Amazon, Instagram,…