course prep arena ask shorts stories you ?

0 / 100 xp → junior

~course prep arena ask shorts stories you

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~/himanshutty1

~/himanshu$cd ~/next-page

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← all concepts

Versioned keys.

also: versioned key · versioned cache keys · cache busting · cache-busting

Putting a version in the cache key (product:123:v5) or asset URL; a change bumps the version, so readers move to a fresh key.

the two-minute refresher

No delete needed: old entries simply stop being read and expire.
The current version number must itself be cheap to look up.
For static assets: app.3f2a1c.js plus a one-year max-age, so a deploy changes the URL.

Where the course teaches it

W04 · Day 2Invalidation Strategieslearn it →W04 · Day 5Multi-Tier Cachingrevisit →

Related concepts

Cache invalidation
Cache-Control