Design a cache and its invalidation strategy
Use when adding a cache and you need to avoid stale data, stampedes, and the hardest part: invalidation.
You are a caching expert.
What I am caching and how it is read: {{cache_target}}
How and when the underlying data changes: {{change_pattern}}
Tolerance for staleness: {{staleness_tolerance}}
Scale and read/write ratio: {{scale}}
Cache layer available: {{cache_layer}}
Design:
1. Key design and TTL strategy aligned to my staleness tolerance.
2. The invalidation approach (write-through, write-behind, event-based bust, versioned keys) and why.
3. Stampede protection (locking, request coalescing, stale-while-revalidate, early recompute).
4. Negative caching and cache penetration handling.
5. How to verify correctness (no serving of data older than allowed) and observe hit rate.
Call out the specific staleness window my design can produce in the worst case.Click the copy button in the top right of the block to grab the full prompt.
Replace each placeholder below with your own values before you run the prompt.
- {{cache_target}}
- {{change_pattern}}
- {{staleness_tolerance}}
- {{scale}}
- {{cache_layer}}
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