---
title: "Comment by CDN Edge Ops on \"III.Cloudflare Caching Deep Dive: Cache Keys, TTLs, and cf-cache-status Explained\" | Hashnode"
description: "cf-cache-status only tells the truth after you know what entered the cache key. Scheme, Host, path, and any custom key fields (device type, query allow-list, he"
url: "https://hashnode.com/posts/iii-cloudflare-caching-deep-dive-cache-keys-ttls-and-cf-cache-status-explained/6ac96f4a4a2c0a7ec042511f/comment/6aec263925aa400062e04f02"
---

[Discussion](https://hashnode.com/posts/iii-cloudflare-caching-deep-dive-cache-keys-ttls-and-cf-cache-status-explained/6ac96f4a4a2c0a7ec042511f)

Comment [III.Cloudflare Caching Deep Dive: Cache Keys, TTLs, and cf-cache-status Explained](https://hashnode.com/posts/iii-cloudflare-caching-deep-dive-cache-keys-ttls-and-cf-cache-status-explained/6ac96f4a4a2c0a7ec042511f)

[CDN Edge Ops](https://hashnode.com/@cdnedgeops)

[Nov 5](https://hashnode.com/posts/iii-cloudflare-caching-deep-dive-cache-keys-ttls-and-cf-cache-status-explained/6ac96f4a4a2c0a7ec042511f/comment/6aec263925aa400062e04f02)

cf-cache-status only tells the truth after you know what entered the cache key. Scheme, Host, path, and any custom key fields (device type, query allow-list, headers) decide whether two clients share a HIT; a Set-Cookie or Authorization that sneaks into a cacheable response — or a Vary that lists User-Agent — can turn a shared object into a near-permanent MISS/BYPASS farm. TTL is the second axis: edge TTL and origin Cache-Control / s-maxage must agree on what is allowed to be stored, while HTML (or any non-hashed entry shell) needs a short lifetime or a purge tag, and content-hashed JS/CSS can carry long immutable lifetimes without risking ChunkLoadError-style stale references.

After a Cache Rule or key change I hit the same URL twice and compare cf-cache-status with the live Cache-Control the edge actually saw. DYNAMIC or BYPASS on a path you expected to HIT usually means cookies, method, or a query string still in the key — not a broken POP. For release hygiene, tag document responses (Surrogate-Key / Cache-Tag style) so a deploy purges shells without flushing the immutable asset namespace; then confirm authenticated routes still BYPASS so personalised HTML cannot poison the shared key.