Controlling

[rahul286]

With reference to:
http://nginx.org/en/docs/http/ngx_http_fastcgi_module.html#fastcgi_cache_path

file names in a cache looks like this:

/data/nginx/cache/c/29/b7f54b2df7773722d382f4809d65029c

Is there any way to use different scheme for this, for example:

/data/nginx/cache/$http_host/$request_uri/

===

Reason:

With reference to
http://nginx.org/en/docs/http/ngx_http_fastcgi_module.html#fastcgi_cache_key

For fastcgi_cache_key "$scheme$request_method$host$request_uri";

If cache path become:

/data/nginx/cache/$scheme/$request_method/$host/$request_uri

Then in location / block I can have something like:

location / {
		try_files /data/nginx/cache/$scheme/$request_method/$host/$request_uri
$uri $uri/ /index.php?$args;
	}    

==

I think if try_files can "hit" cached location like above, it will be
faster. 

As of now for a cached page, a request reaches fastcgi location block (not
fastcgI backend/upstream handler - just another location handler/another
internal rewrite).

In some tests, I found nginx's fastcgi_cache was taking slightly more time
to return a cached page. Difference was too small and I was testing against
only 1 URL.
I think nginx's way will perform better when lookup will be done among 1000s
of cached pages.  

==

Another reason for some control over fastcgi_cache_path is to have
$http_host prefix storage. As of now when clearing cache we need to wipe it
out completely. May be with $http_host in fastcgi_cache_path we will be able
to clear for a single-domain.

Something like:  fastcgi_cache_path /data/nginx/cache/$http_host levels=1:2
keys_zone=one:10m;

Not sure, if above works and creates non-existent directory automatically.

Posted at Nginx Forum: http://forum.nginx.org/read.php?2,232079,232079#msg-232079