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Caching and Redis
- Authors
- Name
- Lucian Oprea
- @LucianDSA_
00:30:00
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Caching Fundamentals and Patterns
⏷ 1. When should you add a cache to a system?
⏷ 2. How does the cache-aside pattern work, and where can it fail?
⏷ 3. How do cache-aside, read-through, write-through, and write-behind differ?
Freshness, Memory, and Failure Modes
⏷ 4. How should you choose TTLs and an invalidation strategy?
⏷ 5. How do Redis eviction policies differ, and how do you choose one?
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⏷ 6. How do you prevent a cache stampede?
⏷ 7. How do you handle negative caching, cache penetration, and hot keys?
Redis Data Modeling and Use Cases
⏷ 8. Which Redis data structure should you choose for a given use case?
⏷ 9. How would you store user sessions in Redis?
⏷ 10. How would you implement rate limiting with Redis?
Coordination and Correctness
⏷ 11. How should a Redis-backed distributed lock be implemented?
⏷ 12. What are the differences between atomic commands, transactions, Lua scripts, and pipelining?
Persistence, High Availability, and Scaling
⏷ 13. When should you use RDB, AOF, both, or no Redis persistence?
⏷ 14. How do Redis replication, Sentinel, and Redis Cluster differ?
⏷ 15. What consistency and failure tradeoffs should you expect from Redis?
Practical Cache Operations
⏷ 16. What are cache hits, cache misses, and hit ratios?
⏷ 17. How do cache expiration and eviction differ?
⏷ 18. When would you use a local cache instead of a distributed cache?
⏷ 19. What makes a good Redis key?
⏷ 20. What should you consider when serializing cached values?
⏷ 21. When should you use a Redis string versus a hash?
⏷ 22. What is cache warming, and when is it useful?
⏷ 23. How would you design a two-level cache?
⏷ 24. How should Redis clients manage connections, timeouts, and retries?
⏷ 25. How do you find and fix big or slow Redis keys?
⏷ 26. How do you measure whether a cache is actually helping?
⏷ 27. How would you isolate multiple tenants in a shared cache?
⏷ 28. How would you design Redis usage across multiple regions?
⏷ 29. How do you capacity-plan a Redis deployment?
⏷ 30. How do you migrate a Redis key schema without downtime?