8 hidden system design pitfalls — cache stampedes, hot partitions, duplicate requests
goyalshaliniuk · x · 2026-11-10
The author explains why systems that handle thousands of requests fine break under higher traffic, expiring caches, or single-service outages — and scaling alone won't fix it. Pitfalls covered: cache stampede (fix with request coalescing so one request rebuilds the cache while others wait), hot partitions (distribute load via key salting), and duplicate requests from network retries (thread truncated here).
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