2 locations, 2 _different_ cache valid settings, but same cache & pass-through

[Francis Daly]

On Tue, Mar 24, 2020 at 11:15:59PM +0000, randyorbs wrote:

Hi there,

> 4. use _different_ cache valid settings...
> location /foo {
>    proxy_pass "http://myhost.io/go";
>    proxy_cache shared_cache;
>    proxy_cache_valid any 5m;
> }
> location /bar {
>    proxy_pass "http://myhost.io/go";
>    proxy_cache shared_cache;
>    proxy_cache_valid any 10m;
> }
> 
> What I have found is that I can request /foo, then /bar and the /bar result will be an immediate HIT on the cache, which is good - the keys are the same and they are both aware of the cache. However, now that I've requested /bar any requests to /foo will result in cache HITs for 10 minutes instead of the 5 minutes I want. If I never hit /bar, then /foo will cache HIT for the correct 5 minutes.
> 
> Any thoughts on how I can use NGINX to configure my way into a solution for my unusual (?) use-case?

The nginx cache file structure includes the validity period within the
stored object file.

The system does not care how the object file got there; it cares about
the file name and file contents.

So, "no".

(At least, not without writing your own special-case caching system.)

What is the thing that you want to achieve? Perhaps there is an alternate
way to get to the same desired end result.

	f
-- 
Francis Daly        francis at daoine.org