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Caching Explained - How Apps Stay Fast Under Heavy Load (System Design #5)

Without caching, even the fastest databases would crumble under real-world traffic. It's one of the most powerful performance tools in any engineer's toolkit.

1 min read

Without caching, even the fastest databases would crumble under real-world traffic. It’s one of the most powerful performance tools in any engineer’s toolkit.

What’s in the video (6m 9s)

  • 0:00 — Caching Fundamentals
  • 0:34 — What is Latency?
  • 1:27 — What is Cache?
  • 1:50 — Cache Hit vs Cache Miss
  • 2:11 — Application-Level Cache vs CDN
  • 2:49 — How an Application-Level Cache Works?
  • 3:12 — How a CDN Works?
  • 3:36 — What is Cache Invalidation?
  • 4:17 — What is Write-Through Cache?
  • 4:37 — How Caching Works?
  • 4:56 — Advantages of Caching
  • 5:21 — Key Takeaways of Caching

Resources

For more in this series, visit the #system-design tag page or jump to the channel uploads list for everything else.

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