annotate contrib/README @ 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> |
date |
Mon, 26 Dec 2011 11:15:23 +0000 |
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2 geo2nginx.pl by Andrei Nigmatulin
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4 The perl script to convert CSV geoip database ( free download
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5 at http://www.maxmind.com/app/geoip_country ) to format, suitable
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6 for use by the ngx_http_geo_module.
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9 unicode2nginx by Maxim Dounin
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11 The perl script to convert unicode mappings ( available
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12 at http://www.unicode.org/Public/MAPPINGS/ ) to the nginx
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13 configuration file format.
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14 Two generated full maps for windows-1251 and koi8-r.
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