nginx-0.7.44

[Igor Sysoev]

On Tue, Mar 24, 2009 at 05:30:02PM +0100, J?r?me Loyet wrote:

> 2009/3/24 Igor Sysoev <is at rambler-co.ru>:
> > On Tue, Mar 24, 2009 at 05:07:23PM +0100, J?r?me Loyet wrote:
> >
> >> 2009/3/23 Igor Sysoev <is at rambler-co.ru>:
> >> > On Mon, Mar 23, 2009 at 10:42:45PM +0800, Delta Yeh wrote:
> >> >
> >> >> How to use the cache feature?
> >> >> What kind of cache does it support?
> >> >
> >> > Here is configuraiton example:
> >> >
> >> > http {
> >> >     proxy_cache_path   /path/to/cache  levels=1:2
> >> >                        keys_zone=NAME:10m
> >> >                        inactive=5m     clean_time=2h00m;
> >> >
> >> >     server {
> >> >         location / {
> >> >             proxy_pass    http://127.0.0.1;
> >> >
> >> >             proxy_cache   NAME;
> >> >
> >> >             proxy_cache_valid   200 302  1h;
> >> >             proxy_cache_valid   301      1d;
> >> >             proxy_cache_valid   any      1m;
> >> >
> >> >             proxy_cache_min_uses  1;
> >> >
> >> >             proxy_cache_use_stale   error  timeout invalid_header http_500;
> >> >         }
> >> >     }
> >> >
> >> > The cache currently ignores backend's Cache-Control, Expires, etc.
> >>
> >> hi Igor,
> >>
> >> Do I understand correctly the proxy_cache_use_stale directive:
> >>
> >> proxy_cache_use_stale   error  timeout invalid_header http_500;
> >>
> >> If cache is still valid {
> >>   serve content from cache
> >> } else {
> >>   Ask fresh data to the backend
> >>   if connection status IS IN  (proxy_cache_use_stale parameters) {
> >>       serve content from cache
> >>   } else {
> >>       act as normal
> >>   }
> >> }
> >
> > Yes.
> 
> Other question, how can I determine the maximum number of cache entrie
> I have with a particular conf ?
> 
> proxy_cache_path  /data/nginx/cache  keys_zone=one:10m;
> 
> What is the size of keys on shared mem (X bytes). So that I can
> extrapole the maximum number N of cache entries with YMo of shared
> memory (N = (Y x 1024 x 1024) / X). (if there is nothing elese in the
> shared mem and if the key size is constant)

The key size is 128 bytes.


-- 
Igor Sysoev
http://sysoev.ru/en/