Maxim Dounin Wrote:
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> Multiple cache files for the same key can be created if a backend
> response uses the Vary mechanism to allow multiple resource
> variants. It is supported and taken into account when caching
> since nginx 1.7.7, http://nginx.org/en/CHANGES:

THANKS THANKS so much!

My solution taken:
- using mod_deflate only for apache listening at 443 only (it is a cpanel host)
- deactivate mod_deflate at apache at 8081 (now, there is no vary at all)
- nginx using apache 8081 as proxy_cache server.
- now nginx is the one sending cache elements using gzip if required.

For me, this is really better that apache proccessing twice, and nginx storing twice (or more) due to vary.

Thanks, again.