High Scale Ecommerce

High-Scale E-Commerce Playbook

AUTHORITATIVE. DENSE. MẠNH.

1. Core Architecture

• Programmatic SEO: Edge-rendered, dynamically generated product pages for max indexability.
• Headless Checkout: API-first, decoupled payment flow. Sub-second latency.
• Database Sharding: Write-heavy order flows distributed across physical shards. Zero single point of failure.

2. System Flow

%%{init: {"theme": "default", "flowchart": {"useMaxWidth": true}}}%%
flowchart TD
    SEO[Organic SEO Traffic] --> CDN[Edge CDN / WAF]
    CDN --> LB[Load Balancer]
    LB --> FE[Headless Frontend]
    FE --> CO[Checkout Service API]
    CO --> S1[(DB Shard 1)]
    CO --> S2[(DB Shard 2)]
    CO --> S3[(DB Shard 3)]

3. Infrastructure (Kubernetes)

apiVersion: apps/v1
kind: Deployment
metadata:
  name: checkout-service
spec:
  replicas: 20
  selector:
    matchLabels:
      app: checkout
  template:
    metadata:
      labels:
        app: checkout
    spec:
      containers:
      - name: checkout-app
        image: registry/checkout:latest
        resources:
          limits:
            cpu: "4"
            memory: "8Gi"
        env:
        - name: SHARDING_STRATEGY
          value: "REGION_BASED"