Hello! On Thu, Jun 04, 2015 at 03:41:32PM +0200, Xavier Noria wrote:
> On Thu, Jun 4, 2015 at 3:11 PM, Maxim Dounin <[email protected]> wrote: > > The problem with Vary is that it causes bad effects on shared caches, in > > particular, it normaly results in cache duplication. > > > You mean that if client A requests a resource with Accept-Encoding: gzip, > and client B without, and the resource has Cache-Control: public, then a > shared cache would store the compressed and uncompressed responses thus > having the content kind of repeated? Not really. The main problem is that there is more than 2 clients, and many of them will use different Accept-Encoding headers, e.g.: gzip,deflate gzip, deflate gzip,deflate,sdch gzip deflate, gzip identity gzip,deflate,lzma,sdch gzip;q=1.0,deflate;q=0.6,identity;q=0.3 gzip;q=1.0, deflate;q=0.8, chunked;q=0.6, identity;q=0.4, *;q=0 deflate identity,gzip,deflate gzip, deflate, peerdist gzip, deflate, identity gzip, x-gzip gzip, deflate, compress As a result, there will be many copies of compressed and uncompressed responses in the cache. -- Maxim Dounin http://nginx.org/ _______________________________________________ nginx mailing list [email protected] http://mailman.nginx.org/mailman/listinfo/nginx
