API
The Gcore Customer Portal is being updated. Screenshots may not show the current version.
CDN
CDN
For static filesFor the entire site
AWS S3B2evolutionClouldFlareConcrete5CraftCs-cartDjango CMSDrupalGoogle Cloud StorageIPBIPSJoomlaKirbyMagentoPerchPrestaShopPyroCMSSocialEngineTypo3vBulletinWebasyst
Gcore pluginRocket pluginW3 Total Cache pluginWP SuperCache plugin
X-CartXenForo
Add CDN servers to ACLHTTP/2
Timeouts
BillingCDN resources overview
Specify an originPrivate originEnable SSL ValidationCreate a custom domain (CNAME)SSL certificatesEnable shielding (paid)Suspend a CDN resource
Configure CDN cachingSet a redirect from an originConfigure browser cachingIgnore Set Cookie or Query stringUse stale cache if origin is unavailableCache Sharding
Manage access policiesRedirect from HTTP to HTTPS
OverviewConfigure and use
Specify HTTP methodsSet SNI hostname
Basic WAF (Beta)
GZip, BrotliFetch
Status codeLarge files deliveryRewriteWebSockets
Add request headersActivate CORSConfigure response headersManage the Host headerIdentify a user's request protocol
Network limits
Image stack overviewEnable Image stack
Convert to WebP or AVIFChange qualityCropResize
Troubleshooting
Streaming via CDN (for paid tariffs)Geobalancer (for paid tariffs)
Create a ruleCreate a template for rulesAvoid indexing
Origin group
SSL overviewOwn SSL certificateLet's Encrypt certificate
PurgePrefetch
Raw Logs (paid)Log Viewer (free)
Reports
Grafana reportsTerraform
Error status codesTraceparentContent unavailabilityLow cache hit ratioLow content delivery speedAttaching or issuing an SSL certificate3xx codes4xx codes5xx codes
API
Chosen image
Home/CDN/CDN resource options/Cache/Use stale cache if origin is unavailable

Always online: provide the stale cache if the origin is unavailable

The option allows serving stale cached content in case of the following errors: error (network or connectivity issues), timeout, invalid_header, updating (cache updating),http_500, http_502, http_503, http_504, http_403, http_404, http_429.

HTTP response for the stale content will contain the header X-Cache: Stale. CDN will check origin availability with each user’s request. As soon as the origin becomes available, fresh files will be cached and served. If the origin is unavailable for a long time, CDN will send Stale content until origin becomes available. 

Please, note that when the site is unavailable, the CDN cache may have not enough content for a correct page display. Situations, when a user will not be able to see some images, style sheets, or other static content, are possible.

To manage this option go to your Resource Advanced Settings, find the Cache section, click Add Option and choose "Always Online". You can enable the option and choose error codes for which a CDN serves stale content. 

Always Online

Was this article helpful?

Not a Gcore user yet?

Learn more about our next-gen CDN

Go to the product page
Edit on GitHub