Edge rules on a Vultr CDN set caching per URL path, query string, cookie, or header to cut origin fetches.
Edge rules and custom caching policies give you fine-grained control over how a CDN processes and delivers content. Instead of applying a single caching policy across an entire site or application, these features allow you to define specific behaviors for different URL paths, query strings, cookies, or headers.
For example, an edge rule can instruct the CDN to cache API responses that are identical across users while bypassing the cache for personalized requests. Similarly, query string and header-based caching policies allow the CDN to serve the correct content variation without always reaching the origin server. This reduces the number of origin fetches, lowers latency, and improves the scalability of applications with complex or frequently changing data.
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