Re: [Pound Mailing List] pound scheduling method ?

On Fri, 2006-05-26 at 11:39 +0200, Oskar Casquero Oiarzabal wrote:
> Hello,
> 
> I'm going to test Pound for balancing in our Plone based e-learning 
> platform. I have setup a cluster in the following way: Squid -> Pound -> 
> ZeoClients 
> (http://plone.org/documentation/how-to/simple-zope-clustering-with-squid-and-pound).
>  
> I have configured pound with cookie value session tracking, which works 
> well, but I can't see what type of scheduling method pound implements (I 
> thought that it was round robin, but it doesn't seem to be it). Perhaps 
> I haven't configured Pound properly.
> 
> The pound configuration file is the following:
> 
> ListenHTTP
>   Address 127.0.0.1
>   Port    8080
>   Service
>      Session
>         Type    Cookie
>         ID      "_ZopeId"
>         TTL     1800
>      End
>      BackEnd
>         Address 192.168.1.5
>         Port    8080
>      End
>      BackEnd
>         Address 192.168.1.5
>         Port    8081
>      End
>      BackEnd
>         Address 192.168.1.5
>         Port    8082
>      End
>   End
> End
> 
> 
> Thanks in advance.
> 
> Regards,
> Oskar

I'm not sure why the scheduling method is important, but if it really
matters to you: Pound distributes the requests randomly to the
back-ends. The actual distribution is uniform, but weighed as per the
priority parameter (a back-end with priority 2 is twice as likely to get
a request as a back-end with priority 1).

It goes without saying that the above applies only in the absence of
sessions - with sessions this is true only of the initial request.
-- 
Robert Segall
Apsis GmbH
Postfach, Uetikon am See, CH-8707
Tel: +41-44-920 4904


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http://www.apsis.ch/pound/pound_list/archive/2006/2006-05/1148636358000/1148921928000