Introduction Consistent hashing assigns keys to nodes such that adding or removing a node remaps only K/N keys on average, […]

Introduction Zero trust replaces implicit perimeter-based trust with continuous verification. The core principle is: never trust, always verify. Every request

Introduction RAG (Retrieval-Augmented Generation) grounds LLM responses in retrieved external knowledge. By injecting relevant retrieved context into the prompt, RAG

Introduction Serving large language models (GPT-4, Llama) requires specialized infrastructure for low latency, high throughput, and GPU memory management. The

Introduction Infrastructure as Code (IaC) manages infrastructure via version-controlled declarative configuration, enabling reproducible, auditable, and automated infrastructure provisioning. Changes go

Introduction Blockchain is an append-only distributed ledger where each block cryptographically links to the previous one. Immutability is guaranteed by

Introduction Kubernetes orchestrates containerized workloads across a cluster, managing scheduling, scaling, self-healing, and networking. The control plane manages desired state

Introduction Time-series databases (TSDB) are optimized for append-heavy workloads of (metric, timestamp, value) triples. Metrics monitoring, IoT telemetry, and financial

Introduction Geospatial indexing enables efficient proximity queries — find all restaurants within 2km — over large datasets of lat/lng coordinates.

Introduction Consensus algorithms allow a cluster of nodes to agree on a sequence of values despite node failures. They are

Introduction Metrics collection is the foundation of system observability. The four core metric types cover most monitoring needs: a counter

Introduction Real-time analytics surfaces business metrics such as DAU, revenue, and conversion rates with sub-second query latency on continuously updating

Introduction Authentication services verify who the user is; authorization services control what they can do. A centralized auth service handles

Introduction Polling systems must ensure one vote per eligible voter, prevent fraud, aggregate results in real time, and optionally preserve

Introduction Electronic Health Record systems store and exchange patient health data across providers, payers, and patients. Design must prioritize data