# liquidslr/system-design-notes

Notes of the book System Desgin Interview - An Insider's Guide

Repository: https://github.com/liquidslr/system-design-notes
Canonical: https://ross.abutalabs.com/products/system-design-notes
License Family: other
Last push: 2026-08-12T22:22:21+00:00

## Health v2 (maintenance only)
Score: 65/100 (v2, computed 2026-09-03T02:20:16.233290+00:00)
- activity 97, release rhythm 35, longevity 44
- inputs: {"age_days": 618, "days_push": 21, "days_rel": null, "gap_med": null, "n_releases_24m": 0}
- flags: no_releases, no_license
- formula: round(0.45*activity + 0.35*rhythm + 0.20*longevity); archived -> min(score, 10)

## Adoption (not part of the score)
Stars 14000, forks 2695 (observed 2026-08-28T04:11:05.278575+00:00)

## What it is
A collection of study notes summarizing the 'System Design Interview - An Insider's Guide' books (Vol 1 and 2) by Alex Xu. It covers topics like scaling, rate limiting, consistent hashing, and designs for systems such as URL shorteners, chat systems, and payment systems.

## Use cases
- prepare for a system design interview
- learn how to scale from zero to millions of users
- understand consistent hashing and rate limiter design
- study how to design a URL shortener or web crawler
- review distributed message queue and object storage design
- get a refresher on back-of-the-envelope estimation

## When to choose
- you are preparing for system design interviews and want concise notes on Alex Xu's books
- you want a free, chapter-by-chapter summary of common system design problems
- you need quick reference material on scalability patterns like rate limiting and consistent hashing

## When to avoid
- you need a complete, polished textbook rather than work-in-progress notes
- you want hands-on code implementations instead of conceptual notes
- you need deep original content beyond what the books cover

## Facets
- artifact type: learning-resource
- maturity: active
- function: documentation, developer-tools
- domain: developer-tools, tutorials, microservices, backend
- platform: -
- tags: system-design, interview-preparation, notes, distributed-systems, scalability, architecture, web-server

## Member repositories
- liquidslr/system-design-notes (main) score 65

## Provenance
- Observed fields: from GitHub, fetched 2026-08-28T04:11:05.278575+00:00.
- Health v2: computed from the inputs above; adoption is never an input.
- Inferred fields (summary, facets, guidance): AI-extracted, prompt v1, taxonomy v1, on 2026-08-29T17:12:53.313171+00:00, confidence not recorded.
  - readme: https://github.com/liquidslr/system-design-notes (fetched 2026-08-28T04:11:05.278575+00:00, sha 134e4b9a2c95)
- Data as of 2026-08-30T08:39:29.467469+00:00.