Poly-SD — Distributed Systems Design

POLY-SD Campaign

Speed

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// Components

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Tier 1 — Foundations

Client

Traffic source

Server

App server

Database

Relational DB

Cache

In-memory cache

Tier 2 — Scaling

Load Balancer

Distribute traffic

Queue

Buffer & decouple

Tier 3 — Advanced

API Gateway

Rate limit & circuit breaker

K8s Fleet

Auto-scaling pod fleet

Kafka

Distributed event stream

CDN

Edge cache, global PoPs

NoSQL

High-throughput key-value DB

Object Storage

Durable blob storage (S3)

// More unlock as you progress

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// Config

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