System Design Overview

First PublishedMay 5, 2026Last UpdatedMay 7, 2026ByAtif Alam

This section gives a spine for architecture and design reviews: questions to ask stakeholders, checklist-style patterns, and links into deeper guides elsewhere in the library (databases, networking, observability, CI/CD, security). It complements operations-focused pages rather than replacing them.

Use the condensed page first — design review checklist — when you want a single pass before a review or RFC.

Design Discussion Order

1. Requirements and SLAs
2. Capacity estimation
3. Data modeling and storage
4. API design (implementation depth: HTTP, payloads, layouts)
5. Read scaling
6. Write scaling
7. Caching patterns
8. Consistency and transactions
9. Fault tolerance
10. Observability for systems
11. Security, deployment, and tradeoffs

Reference: Abbreviation glossary.

Topics in This Section

Topic	What It Covers
Design review checklist	One-page bullets and sequencing for fast review
Requirements and SLAs	Read/write mix, scale targets, SLAs, consistency and geography
Capacity estimation	QPS, storage, bandwidth, bottlenecks
Data modeling and storage	SQL vs NoSQL, normalization, indexes, sharding
API design	REST, gRPC, GraphQL, errors, pagination, idempotency; HTTP contracts and layouts for implementation
Read scaling	Cache, replicas, CDN, fan-out, materialized views
Write scaling	Queues, batching, async paths, pooling, sharding
Caching patterns	Aside, write-through, eviction, stampedes
Consistency and transactions	Strong vs eventual, sagas, CAP and PACELC
Fault tolerance	Retries, breakers, degradation, release safety
Observability for systems	Logs, metrics, traces, RED/USE, postmortems
Security, deployment, and tradeoffs	Trust boundaries, rollout patterns, documenting decisions
Glossary	Common abbreviations

Related Sections

Need	Where to Go
Database operations and on-call	Databases
HTTP and edge behavior	Networking
Deep observability stack	Observability
Deployment and pipelines	CI/CD
Security and compliance	Security
Incidents and readiness	QA
Process and communication	Practices