upstream keepalive - call for testing

[liseen]

Hi

Could nginx keepalive work with HealthCheck?  Does Maxim Dounin  have a
support plan?



On Wed, Aug 3, 2011 at 3:09 AM, David Yu <david.yu.ftw at gmail.com> wrote:

>
>
> On Wed, Aug 3, 2011 at 2:47 AM, Maxim Dounin <mdounin at mdounin.ru> wrote:
>
>> Hello!
>>
>> On Wed, Aug 03, 2011 at 01:53:30AM +0800, David Yu wrote:
>>
>> > On Wed, Aug 3, 2011 at 1:50 AM, Maxim Dounin <mdounin at mdounin.ru>
>> wrote:
>> >
>> > > Hello!
>> > >
>> > > On Wed, Aug 03, 2011 at 01:42:13AM +0800, David Yu wrote:
>> > >
>> > > > On Wed, Aug 3, 2011 at 1:36 AM, Maxim Dounin <mdounin at mdounin.ru>
>> wrote:
>> > > >
>> > > > > Hello!
>> > > > >
>> > > > > On Tue, Aug 02, 2011 at 04:24:45PM +0100, António P. P. Almeida
>> wrote:
>> > > > >
>> > > > > > On 1 Ago 2011 17h07 WEST, mdounin at mdounin.ru wrote:
>> > > > > >
>> > > > > > > Hello!
>> > > > > > >
>> > > > > > > JFYI:
>> > > > > > >
>> > > > > > > Last week I posted patch to nginx-devel@ which adds keepalive
>> > > > > > > support to various backends (as with upstream keepalive
>> module),
>> > > > > > > including fastcgi and http backends (this in turn means nginx
>> now
>> > > > > > > able to talk HTTP/1.1 to backends, in particular it now
>> > > > > > > understands chunked responses).  Patch applies to 1.0.5 and
>> 1.1.0.
>> > > > > > >
>> > > > > > > Testing is appreciated.
>> > > > > > >
>> > > > > > > You may find patch and description here:
>> > > > > > >
>> > > > > > >
>> > > http://mailman.nginx.org/pipermail/nginx-devel/2011-July/001057.html
>> > > > > > >
>> > > > > > > Patch itself may be downloaded here:
>> > > > > > >
>> > > > > > > http://nginx.org/patches/patch-nginx-keepalive-full.txt
>> > > > > > >
>> > > > > > > Upstream keepalive module may be downloaded here:
>> > > > > > >
>> > > > > > > http://mdounin.ru/hg/ngx_http_upstream_keepalive/
>> > > > > > >
>> http://mdounin.ru/files/ngx_http_upstream_keepalive-0.4.tar.gz
>> > > > > > >
>> > > > > >
>> > > > > > So *either* we use the patch or use the module. Correct?
>> > > > >
>> > > > > No, to keep backend connections alive you need module *and* patch.
>> > > > > Patch provides foundation in nginx core for module to work with
>> > > > > fastcgi and http.
>> > > > >
>> > > > With a custom nginx upstream binary protocol, I believe multiplexing
>> will
>> > > > now be possible?
>> > >
>> > > ENOPARSE, sorry.
>> > >
>> > After some googling ...
>> > ENOPARSE is a nerdy term. It is one of the standard C library error
>> codes
>> > that can be set in the global variable "errno" and stands for Error No
>> > Parse. Since you didn't get it, I can thus conclude that unlike me you
>> are probably
>> > a normal, well adjusted human being ;-)
>>
>> Actually, this definition isn't true: there is no such error code,
>> it's rather imitation.  The fact that author of definition claims
>> it's real error indicate that unlike me, he is normal, well
>> adjusted human being. ;)
>>
>> > Now I get it.  Well adjusted I am.
>>
>> Now you may try to finally explain what you mean to ask in your
>> original message.  Please keep in mind that your are talking to
>> somebody far from being normal and well adjusted. ;)
>>
>> Maxim Dounin
>>
>> p.s. Actually, I assume you are talking about fastcgi
>> multiplexing.
>
> Nope not fastcgi multiplexing.  Multiplexing over a custom/efficient nginx
> binary protocol.
> Where requests sent to upstream include a unique id w/c the upstream will
> also send on response.
> This allows for asychronous, out-of-bands, messaging.
> I believe this is what mongrel2 is trying to do now ... though as an http
> server, it is nowhere near as robust/stable as nginx.
> If nginx implements this (considering nginx already has a lot of market
> share), it certainly would bring more developers/users in (especially the
> ones needing async, out-of-bands request handling)
>
>
> Short answer is: no, it's still not possible.
>>
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>
>
>
> --
> When the cat is away, the mouse is alone.
> - David Yu
>
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