When EdgeOne retrieves resources from the origin, if the origin successfully responds with the resources, EdgeOne will respond to the client request and cache it in EdgeOne for direct response next time. If the origin responds with an exception status code such as 4xx or 5xx, EdgeOne cannot obtain the resources, and the next request will still trigger a follow origin, which may put significant pressure on the origin. By configuring the status code cache TTL, EdgeOne can directly respond with the exception status code within the cache time, instead of triggering a follow origin for all requests, which can mitigate the pressure on the origin and improve the response speed.
Currently, the following status codes can be configured:
4xx: 400, 401, 403, 404, 405, 407, 414.
5xx: 500, 501, 502, 503, 504, 509, 514.
Note：
EdgeOne caches the 404 status code by default for 10 seconds.
Directions
Scenario 1: Configure status code cache TTL for all domain names of a site
If you need to configure the status code cache TTL for the whole connected site, or as a fallback configuration for the site level, please refer to the following steps:
1. Log in to the EdgeOne console, click on the site list in the left menu bar, and click on the site you want to configure within the site list.
2. In the site details page, click on Security Acceleration > Cache Configuration, find the node cache TTL card.
3. In the rule engine management page, click on create rule to enter the new rule editing page. On the rule editing page, select the matching type as All
4. Click on the operation, and in the pop-up operation list, select the operation as status code cache, and configure the corresponding cache status code and cache time.
5. Click save and publish to complete the rule configuration.
Scenario 2: Configure status code cache TTL for specified domain names, paths, or file extensions
If you need to configure different status code cache TTL for different domain names, paths, or file extensions, for example, configure the status code cache TTL for the www.example.com domain under the example.com site, please refer to the following steps:
1. Log in to the EdgeOne console, click on the site list in the left menu bar, and click on the site you want to configure within the site list.
2. In the site details page, click on the rule engine.
3. In the rule engine management page, click on create rule to enter the new rule editing page. On the rule editing page, select Host as the matching type and configure it as www.example.com.
4. Click on the operation, and in the pop-up operation list, select the operation as status code cache, and configure the corresponding cache status code and cache time.
5. Click save and publish to complete the rule configuration.
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