Edge Security Acceleration:Global cache configuration

Feature

Description

Query string

You can specify whether points of presence (POPs) ignore the question mark (?) and the query string that follows the question mark (?) in a request URL before cache keys are generated. The query string includes information such as user identity and originating IP addresses. This increases the cache hit ratio and accelerates page loading.

Browser cache time-to-live (TTL)

Browser cache time-to-live (TTL) defines how long resources (such as HTML, CSS, JavaScript files, and images) are stored in the local browser cache. By default, it follows the Cache-Control header settings of the origin. You can configure the client TTL without modifying the origin settings. This allows resources within the validity to be loaded directly from the local cache. This speeds up page loading and improves user experience.

Edge cache time-to-live (TTL)

The edge cache time-to-live (TTL) is the period of time during which origin resources are cached on Edge Security Acceleration (ESA) points of presence (POPs). When the TTL ends, resources that are cached on POPs are marked as expired. If the requested resource has expired on a POP, the POP retrieves the most recent resource from the origin server and caches it. You can configure a cache TTL for static resources based on file directories or file name extensions. This reduces the load on the origin server and improves access performance.

Developer mode

Enable development mode to ensure that clients can immediately retrieve the latest static resources. When this mode is enabled, static resource requests temporarily bypass the caching components of Edge Security Acceleration (ESA) and are forwarded directly to the origin server. This lets you verify changes to your origin content.

Query string sorting

When you enable the query string sorting feature, Edge Security Acceleration (ESA) automatically sorts the query string parameters in a URL when processing a request. ESA then uses the sorted query string to look up content in the cache or forward the request. This means that a point of presence (POP) treats requests as being for the same file if the parameters and their values are identical, regardless of their order in the URL. This feature helps improve the cache hit ratio.