Mercurial > hg > nginx-quic
annotate src/core/nginx.h @ 4385:70ba81827472
Cache locks initial implementation.
New directives: proxy_cache_lock on/off, proxy_cache_lock_timeout. With
proxy_cache_lock set to on, only one request will be allowed to go to
upstream for a particular cache item. Others will wait for a response
to appear in cache (or cache lock released) up to proxy_cache_lock_timeout.
Waiting requests will recheck if they have cached response ready (or are
allowed to run) every 500ms.
Note: we intentionally don't intercept NGX_DECLINED possibly returned by
ngx_http_file_cache_read(). This needs more work (possibly safe, but needs
further investigation). Anyway, it's exceptional situation.
Note: probably there should be a way to disable caching of responses
if there is already one request fetching resource to cache (without waiting
at all). Two possible ways include another cache lock option ("no_cache")
or using proxy_no_cache with some supplied variable.
Note: probably there should be a way to lock updating requests as well. For
now "proxy_cache_use_stale updating" is available.
author | Maxim Dounin <mdounin@mdounin.ru> |
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date | Mon, 26 Dec 2011 11:15:23 +0000 |
parents | 88aa90a198dd |
children | b1f9916c7c4e |
rev | line source |
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2 /* |
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3 * Copyright (C) Igor Sysoev |
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4 */ |
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7 #ifndef _NGINX_H_INCLUDED_ |
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8 #define _NGINX_H_INCLUDED_ |
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4324 | 11 #define nginx_version 1001011 |
4370 | 12 #define NGINX_VERSION "1.1.12" |
775 | 13 #define NGINX_VER "nginx/" NGINX_VERSION |
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15 #define NGINX_VAR "NGINX" |
543 | 16 #define NGX_OLDPID_EXT ".oldbin" |
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19 #endif /* _NGINX_H_INCLUDED_ */ |