Pagination That Scales: Offset vs Cursor vs Keyset
Trade-offs, pitfalls, and production-ready code with SQL, Node, FastAPI, MongoDB and Elasticsearch examples.
databasesbackendpostgresql
Posts tagged “architecture”
Tiny explainers grouped by topic. Spend less time Googling, more time building.
Events, Commands, and Sagas — coordinate cross‑service work without tight coupling
Commands say 'do X', events say 'X happened'. Use sagas (orchestration or choreography) for long‑running, cross‑service workflows with compensations, idempotency, and reliable messaging.
devarchitecturemicroservices
Queues 101 — At‑Least‑Once (and Why “Exactly‑Once” Is a Myth)
Design for duplicates and reordering. Use idempotency, an inbox/outbox, and per‑key ordering to get effectively‑once processing in real systems.
devarchitecturemessaging
Long Polling vs WebSockets vs Server‑Sent Events — real‑time communication compared
A practical comparison of three ways to push updates from server to browser. Learn how each works, trade‑offs, code snippets, scaling notes, and a quick decision guide.
devrealtimewebsockets
Common Design Patterns — The 5‑Minute Version
A whirlwind tour of widely used patterns—Singleton, Factory, Observer, Strategy, Adapter/Decorator—with tiny examples, when to use them, and common pitfalls.
devprogrammingdesign-patterns
Monolith vs Microservices — A Quick Comparison
The practical trade‑offs: when a monolith (or modular monolith) is the right call, when microservices pay off, and how to evolve without pain.
devarchitecturemicroservices