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From Igor Cicimov <icici...@gmail.com>
Subject Re: [users@httpd] Active Active Data center and stickyness
Date Tue, 29 Mar 2011 23:16:14 GMT
Hi guys,

Just scanned through the thread quickly so not sure if this makes any sense
but what about F5 source IP stickiness?

Cheers,
Igor

On Wed, Mar 30, 2011 at 3:34 AM, Mohit Anchlia <mohitanchlia@gmail.com>wrote:

> Currently, the load balancer don't provide the user
> stickyness/persistence for 'x' amount of time. At this point only
> option I see is that of creating a custom solution. It looks like
> there is no good solution.
>
> Problem here is User can be directed to any site by load balancer in
> active active scenario where load is being balanced as 1:1 ratio.
>
> Cookie was a good option but doesn;t work for non-browser client where
> browser connection to server A and then server A then make Http
> request. So in essence it's the ip of server A that is making the
> request and there is no way to use cookies in such scenarios.
>
> On Tue, Mar 29, 2011 at 7:25 AM, Ben Timby <btimby@gmail.com> wrote:
> > On Mon, Mar 28, 2011 at 10:42 PM, Mohit Anchlia <mohitanchlia@gmail.com>
> wrote:
> >> Thanks! We are using F5 GTM as global load balancer with LTM. So
> >> global load balancing is not a problem. Problem is user stickyness
> >> that need to persist beyond individual session.
> >>
> >> I forgot to mention that the problem is that these connections come
> >> from the servers using http rather than browser and that's why cookies
> >> here will probably not work.
> >
> > Then you will have to review your load balancer docs and see what
> > options are available and go from there. A common load balancing
> > method is SOURCE, where the source of the request is hashed to
> > determine the backend server to direct the request to. This would
> > ensure the same source always hits the same backend (as long as it is
> > available). The downside to this method is that upstream proxies hide
> > the client's IP address and undermine the load balancing effectiveness
> > of this method. However, you know the user (or group of users) will be
> > sticky.
> >
>
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