---
title: "CDN Caching Guides"
description: "Design cache policies that improve speed and resilience without serving stale or private content."
canonical_url: https://optimi.com/en/guides/tags/cdn-caching
md_url: https://optimi.com/en/guides/tags/cdn-caching.md
---

# CDN Caching Guides

Design cache policies that improve speed and resilience without serving stale or private content.

- [CDN Caching Explained](/en/guides/cdn-caching.md): Learn how CDN caching works, which assets and responses are safe to cache, how cache keys and purges work, and how to avoid serving private data publicly.

- [Cache-Control Guide](/en/guides/cache-control.md): A practical Cache-Control guide with safe patterns for static assets, HTML, APIs, private data, shared CDNs, revalidation, and stale responses.

- [CDN Cache Misses](/en/guides/cdn-cache-misses.md): Learn how to distinguish a real cache miss from a bypass or revalidation, find the root cause, and improve CDN cache efficiency without caching private data.

- [Cache Warming Explained](/en/guides/cache-warming.md): Learn how cache warming reduces cold-cache latency, which URLs to warm, how to avoid stale or unsafe content, and what to measure at the edge.

- [Cache Purging Without Downtime](/en/guides/cache-purging.md): Learn how to invalidate CDN content safely with scoped purges, versioned assets, stale serving, verification, and rollback procedures.

- [Static vs Dynamic Content](/en/guides/static-vs-dynamic-content.md): Learn what to cache at the edge, how to handle dynamic and personalized content, and how to verify cache correctness without leaking data.

- [Redirects, Caching, and SEO](/en/guides/redirects-caching-seo.md): Redirect chains, cached responses, and inconsistent canonical signals can slow users and complicate crawling. Learn how to design and measure them safely.

- [Next.js Caching on Vercel](/en/guides/nextjs-vercel-cache-model.md): A practical guide to Next.js caching on Vercel: cache Acme Shop public catalog and database reads safely with cache boundaries and safe cache defaults, while keeping personalized responses out of shared caches.

- [Next.js Revalidation on Vercel](/en/guides/nextjs-vercel-revalidation.md): A Next.js 16 guide to Next.js revalidation on Vercel: drive on-demand ISR from one trusted Acme Shop publishing event, tag public data correctly, apply stale-while-revalidate safely, and recover without broad purges.

- [Debug Next.js Caching](/en/guides/nextjs-vercel-cache-debugging.md): A production-safe Next.js cache debugging workflow to classify Acme Shop cache behavior, read Vercel cache headers and cache HIT MISS states, and recover with the narrowest Vercel action.

- [Cloudflare Cache Rules](/en/guides/cloudflare-cache-rules.md): Configure and validate Cloudflare Cache Rules safely, with clear cache-key, origin-header, and purge responsibilities for public web content.

- [Fastly Caching with VCL](/en/guides/fastly-caching-vcl.md): Configure and validate Fastly VCL caching with explicit TTLs, a disciplined VCL cache key and TTL contract, correct Fastly pass behavior, origin-failure handling, shielding, staged activation, and practical rollback steps.

- [Fastly Origin Shielding](/en/guides/fastly-origin-shielding.md): Configure Fastly origin shielding safely by choosing a shield near each origin, assigning it per backend, verifying cache-miss behavior, monitoring logs and headers, and retaining a rollback path.