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IntermediateApplied2 weeks

Caching

Reduce latency and backend load with Redis, CDNs, cache keys, invalidation, and cache-aside patterns.

Topic 11 of 24

Prerequisites

Databases
API Development

Key Concepts & Skills

Redis
CDN
Cache Strategies
Design cache keys
Use TTLs
Avoid stale data bugs
Measure cache hit ratio

Learning Outcomes

Understand the core principles of Redis
Configure and deploy CDN successfully
Troubleshoot common issues with Cache Strategies
Understand the core principles of Design cache keys
Configure and deploy Use TTLs successfully
Troubleshoot common issues with Avoid stale data bugs
Understand the core principles of Measure cache hit ratio

Resources

Official Docs

Redis docs Cloudflare CDN learning AWS caching overview

Practice Exercises

Cache expensive read queries.Add TTL and invalidation rules.Measure before and after response time.

Project Task

Add Redis caching to an e-commerce product API.

Quiz

What can go wrong with cache invalidation?Explain the answer with one real-world example.List one mistake a beginner might make here.

Notes