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System Design Basics - Cache Invalidation

System Design Basics - Cache Invalidation

Breaking Down Cache Invalidation: Timing, Strategy, and Pitfalls

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Sahil Sarwar
Jun 22, 2025
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System Design Basics - Cache Invalidation
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Hello guys, In the world of system design, caching is one of the most powerful tools for improving performance and scalability. But with great power comes great complexity — and one of the trickiest challenges developers face is cache invalidation.

Imagine a scenario where your application keeps serving outdated data even after the underlying database is…

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A guest post by
Sahil Sarwar
Software engineer writing not just to learn, but to build intuition, to ask the whys. Systems, protocols, and the magic underneath them all.
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