Easy Learn
A ground-up, beginner-to-production guide to API key management: what API keys are and where they came from historically as the programmable web took off in the mid-2000s, the problems they solve for machine-to-machine traffic (identification, rate limiting, revocation, accountability, billing and metering), core vocabulary (API key, hash, scope, rate limit,…
A complete, beginner-to-production guide to at-least-once delivery: what it means (a message will arrive one or more times but never zero times), its history from IBM MQSeries and MSMQ through SQS, Kafka, Pub/Sub and Azure Service Bus, why networks and the Two Generals’ Problem make perfect delivery impossible, the three…
A practical, no-fluff walkthrough of which certifications actually move the needle for Solution, Enterprise, Cloud, and Technical Architect roles across Indian IT — and which ones are mostly resume decoration. Opens with the shift from scar-tissue architects of the early 2000s (senior developers trusted with the whole system diagram after…
A complete, beginner-to-production walkthrough of backward-compatible API design — the discipline of evolving an API without ever disconnecting the phone number that existing callers already dialled. Opens with the postal-address analogy (renovate the house all you like, just never invalidate the address) and traces sixty years of software history that…
A complete, beginner-to-production guide to one of the most consequential and recurring decisions a software architect makes: when to build a capability in-house, and when to buy it from a vendor. Opens with the restaurant analogy that motivates the whole shift – buy the commodity ingredients, cook only what makes…
A complete, beginner-friendly guide to the “A” in ACID: what atomicity means, its origins in Jim Gray’s 1970s-1980s transaction work and the ACID acronym coined by Reuter and Härder, the multi-step / concurrent / crash-recovery problems it solves, the core vocabulary (transaction, commit, rollback, ACID, statement- vs transaction-level atomicity), the…
A complete beginner-to-production guide to the cache-aside (lazy loading) pattern: what it is, its history from CPU hardware caches in the 1980s through Facebook popularizing Memcached-in-front-of-MySQL in the 2000s, the problem of database bottlenecks and hot-key traffic, core vocabulary (cache, hit, miss, TTL, invalidation, key-value store, LRU with hashmap +…
A complete, plain-language guide to authentication vs. authorization: what each term really means, a short history from CTSS passwords through Kerberos, LDAP, SAML, OAuth and OpenID Connect, why the two are so easily confused (including 401 vs 403), authentication factors and MFA, the four authorization models (ACL, RBAC, ABAC, ReBAC),…
A complete beginner-to-production guide to cache eviction: what it is, its 1960s hardware-cache origins with Maurice Wilkes and the memory wall, the problem of finite fast memory, core vocabulary (hit, miss, capacity, eviction, policy, TTL, invalidation, working set, hit ratio), cache architecture and components, all major eviction algorithms with Java…
A complete, beginner-friendly guide to cloud capacity planning: what it really means, a short history from the Erlang formula to the cloud era, why we plan even with elasticity, the two failure modes (under- and over-provisioning), core vocabulary, predictive vs reactive scaling, architecture and components, how scaling decisions actually get…