CDN and Caching

Outline

1. CDN Fundamentals

• How a CDN works
• Cloudflare’s global edge network
• Benefits and when to use a CDN

2. Caching Basics

• Browser cache vs CDN cache
• Cache layers
• Cache strategies

3. Cache Rule Configuration

• Page Rules

  • Create page rules
  • Cache level settings
  • URL pattern matching

• Cache Rules

  • New cache rules system
  • More flexible cache control
  • Conditions and actions

4. Cache Control

• Cache Levels

  • Standard caching
  • Ignore query string
  • Bypass cache

• TTL (Time to Live)

  • Setting TTL values
  • Browser cache TTL
  • Edge cache TTL

5. Purging Cache

• Purge a single file
• Purge an entire zone
• Purge specific paths
• Cache pre-warming

6. Cache Optimization Tips

• Static asset strategies
• Dynamic content caching
• API response caching
• Images and media caching

7. Performance Optimizations

• Compression (Gzip, Brotli)
• HTTP/2 and HTTP/3
• Image optimization (Polish)
• Auto minification

8. Advanced Features

• Argo Smart Routing

  • Smarter routing
  • When to use

• Railgun

  • Dynamic content acceleration
  • Setup and usage

9. FAQs

• Cache misses
• Stale content after purge
• Dynamic content cached unexpectedly
• Low cache hit ratio

10. Summary

• Best practices for CDN and cache setup
• Performance tips