Need more details about max_fails and fail_timeout
sunyijiang at gmail.com
Thu Feb 19 06:14:09 MSK 2009
Thanks for your answer.
So to Nginx, an upstream server is either good (operative) or bad
(inoperative). In good state, if it fails *max_fails* times within *
fail_timeout* period of time, Nginx switches its state to bad. If not, it
stays good. In bad state, Nginx will try the server every
*fail_timeout*time, if succeeds, its state is switched back to good,
otherwise it stays
bad. Nginx only dispatches requests to good servers. Any problem with this
2009/2/19 Anton Yuzhaninov <citrin at citrin.ru>
> Sun Yijiang wrote:
>> I'm new to nginx, spent a morning reading nginx documentation. I'm still
>> not clear how nginx determines the status of upstream servers. Let's say we
>> have some upstream servers, all set to max_fails=3 and fail_timeout=30s.
>> According to the document, if one server fails 3 times within 30s time,
>> nginx will mark this server to be inoperative and won't direct any request
>> to it. Is that right?
> Then the question is: will nginx try this server again later to see if it
> Yes, it will try to send requests after fail_timeout.
> So fail_timeout used twice - errors counted for fail_timeout, and upstream
> marked as dead for
> Anton Yuzhaninov
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