RAG & VECTOR DATABASES / SYSTEM CONCEPT BRIEF

Why RAG?

Inspect every stage of grounded retrieval and generation.

Phase 10 / Topic 2 of 25RequirementsTrade-offsFailure modes

The full written guide for Why RAG? is being prepared.

Complete guides include explanation, worked examples, code in multiple languages, complexity, common mistakes, interview questions, and practice problems. Until then, use the study framework below.

READ NOW IN THIS PHASEWhat is RAG?RAG vs fine-tuning RAG vs Agentic RAG

ROADMAP POSITIONPhase 10

RAG & Vector Databases. Topic 2 of 25 in this phase.

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Start with requirements

Identify workload shape, correctness needs, latency targets, scale, and operational constraints before selecting technology.

Draw the data path

Follow one request from entry to storage and back. Mark ownership, state transitions, and every network boundary.

Model failure

Ask what degrades, how failure is detected, and whether recovery preserves the guarantees users depend on.

Measure the outcome

Connect the design to throughput, tail latency, errors, saturation, availability, and cost.

ACTIVE RECALL

Turn the concept into a skill.

STEP 1

Scope

Write functional requirements, scale estimates, and two explicit non-goals.

STEP 2

Design

Draw the critical request and data paths before adding secondary components.

STEP 3

Challenge

Remove one dependency, overload another, and explain detection and recovery.