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From Pranjal Thakur <pranj...@gmail.com>
Subject Re: [users@httpd] Re: Load balancing between different versions of a web application
Date Tue, 07 Jul 2009 00:56:06 GMT
I am using the apache mod_proxy load balancer:
http://httpd.apache.org/docs/2.2/mod/mod_proxy_balancer.html

I am not able to find any configuration change that I could make to achieve
this.
Here is the situation:
my web application has 2 versions say N and N+1. N has 5 instances and N+1
has 5 instances running on the same cloud.
A user gets to an instance of N the first time. I want all the following
requests from that user to go to any of the 5 instances of N and not go to
any instance of N+1 at all.


On Mon, Jul 6, 2009 at 7:26 PM, Jonathan Zuckerman <j.zuckerman@gmail.com>wrote:

> On Mon, Jul 6, 2009 at 1:49 PM, Pranjal Thakur<pranjalt@gmail.com> wrote:
> > Hello,
> > My problem is mentioned in the previous post (see below). I want to add
> that
> > I cannot use sticky sessions as the cloud that hosts our sessions is
> fully
> > clustered and so has the ability to send requests to a different server
> > instance in case the current instance fails.
> >
> > let me know if there is a way to achieve this.
> > thanks.
> >
> > On Mon, Jul 6, 2009 at 11:24 AM, Pranjal Thakur <pranjalt@gmail.com>
> wrote:
> >>
> >> This is more of a theoretical question.
> >> I want to know if it is possible to do this:
> >>
> >> I have various versions of a web application, each running certain
> number
> >> of instances.
> >> When a request comes in, it goes to a certain instance of some version.
> >> I want the load balancer to now route further requests from this user to
> >> only the instances of the version it was first routed to.
> >> I can maintain a cookie or some other way to save the version number of
> >> the instance. But I need the load balancer to now take that into
> >> consideration for further requests.
> >> Is this possible and Is there any plugin available for this?
> >>
> >> Any help will be appreciated. thank you.
> >
> >
>
> Probably will need to contact whoever hosts your app for more info,
> but theoretically I don't see why this can't be achieved, what type of
> load balancer are you using?  I used netscaler briefly in the past and
> it was infinitely configurable..
>
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