req.hash_always_miss
BOOL, can be read and set, but not unset.
Available inrecv
Forces the request to be treated as a cache miss regardless of whether we have a copy of the object in cache.
Setting this in vcl_recv differs from return(pass) in that Request collapsing is performed when "Always miss" is set, allowing simultaneous requests for the same object to be collapsed into a single request to origin. In contrast, when using pass mode, request collapsing is disabled.
When enabled, this mode also makes stale objects unusable, thereby disabling the effects of the stale-while-revalidate and stale-if-error Cache-Control directives.
Try it out
req.hash_always_miss is used in the following code examples. Examples apply VCL to real-world use cases and can be deployed as they are, or adapted for your own service. See the full list of code examples for more inspiration.
Click RUN on a sample below to provision a Fastly service, execute the code on Fastly, and see how the function behaves.
Early expiry of cached objects
Cached a large number of objects for too long and want to update and shorten their TTLs.
