weight and balancing in upstream proxy

Frank Liu gfrankliu at gmail.com
Thu Apr 13 23:08:23 UTC 2017

Hi Maxim,
Thanks for pointing out the link is not related. Do you have the answer to the original question or a related link?

> On Apr 13, 2017, at 7:34 AM, Maxim Dounin <mdounin at mdounin.ru> wrote:
> Hello!
>> On Thu, Apr 13, 2017 at 10:09:16AM +0200, B.R. via nginx wrote:
>> That is an interesting questions as intuitively, people could think the
>> former behavior applies.
>> If I got the source code
>> <https://trac.nginx.org/nginx/browser/nginx/src/http/ngx_http_upstream_round_robin.c#L507>
>> right, and as the docs
>> <https://nginx.org/en/docs/http/ngx_http_upstream_module.html#upstream>
>> state, nginx is following a weighted round-robin
>> <https://en.wikipedia.org/wiki/Weighted_round_robin> algorithm.
>> It thus means it will go over the same list of servers everytime a peer
>> needs to be chosen (ie for every request), and pick the first not having
>> depleted its weight allocation.
>> To me, it would use the latter of your proposals.
>> Please correct me if I am wrong, so incorrect information does not
>> propagate too much. :o)
> The Wikipedia link in question doesn't seem to be related to what 
> nginx does.
> -- 
> Maxim Dounin
> http://nginx.org/
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