Step 4: Caching
Navigation: Main Index | ← Step 3: Consistency | Step 5: Network Protocols →
Overview
This step covers caching strategies, cache policies, CDN, and performance optimization techniques essential for building high-performance systems.
Topics Covered
1. Cache (Redis & Memcached)
- Redis vs Memcached comparison
- Cache patterns and strategies
- Implementation best practices
2. Write Policy
- Write-through, write-behind, write-around
- Cache invalidation strategies
- Trade-offs and use cases
3. Replacement Policy
- LRU, LFU, FIFO, and other eviction policies
- When to use each policy
- Implementation considerations
4. Content Delivery Network (CDN)
- How CDNs work
- Edge caching and geographic distribution
- CDN selection and optimization
Quick Navigation
| Topic | File | Key Concepts |
|---|---|---|
| Cache | cache-redis-memcached.md | Redis, Memcached, cache patterns |
| Write Policy | write-policy.md | Write-through, write-behind, invalidation |
| Replacement Policy | replacement-policy.md | LRU, LFU, FIFO, eviction |
| CDN | cdn.md | Edge caching, geographic distribution |
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