Hi,
   I've configured pound with two BackEnds and Session Type IP, TTL 300.

However all the load goes to one of the back end servers, I never see an
apache connection on the other until the "primary" goes down.  I'm not using
Emergency, and if I comment out the Session block the load is balanced
evenly between the two servers.


Relevant portion of my pound.cfg:

        Service
                BackEnd
                        Address 10.0.0.2
                        Port    80
                End
                Session
                        Type IP
                        TTL 300
                End
        End
        Service
                BackEnd
                        Address 10.0.0.4
                        Port    80
                End
                Session
                        Type IP
                        TTL 300
                End
        End


Originally I had:

        Service
                Session
                        Type IP
                        TTL 300
                End
                BackEnd
                        Address 10.0.0.2
                        Port    80
                End
                BackEnd
                        Address 10.0.0.4
                        Port    80
                End
        End

The behaviour seems to be identical with both of the above configurations,
it doesn't do any load balancing when Session is declared.

From my understanding of the manpage load should still be balanced when
session handling is used, individual users will be bound to a single server
but it should alternate with each new connection.  Am I misunderstanding
session handling?
[...]

Are you trying this from a different location?

If you try to hit it from the same location, it will direct you to the
same server (because you ARE coming from the same IP). 

-----Original Message-----
From: interlnk(at)gmail.com [mailto:interlnk(at)gmail.com] On Behalf Of Cam
Roberts
Sent: Tuesday, September 30, 2008 4:06 PM
To: pound(at)apsis.ch
Subject: [Pound Mailing List] load is not balanced when session handling

Hi,
   I've configured pound with two BackEnds and Session Type IP, TTL 300.

However all the load goes to one of the back end servers, I never see an
apache connection on the other until the "primary" goes down.  I'm not
using Emergency, and if I comment out the Session block the load is
balanced evenly between the two servers.


Relevant portion of my pound.cfg:

        Service
                BackEnd
                        Address 10.0.0.2
                        Port    80
                End
                Session
                        Type IP
                        TTL 300
                End
        End
        Service
                BackEnd
                        Address 10.0.0.4
                        Port    80
                End
                Session
                        Type IP
                        TTL 300
                End
        End


Originally I had:

        Service
                Session
                        Type IP
                        TTL 300
                End
                BackEnd
                        Address 10.0.0.2
                        Port    80
                End
                BackEnd
                        Address 10.0.0.4
                        Port    80
                End
        End

The behaviour seems to be identical with both of the above
configurations, it doesn't do any load balancing when Session is
declared.

From my understanding of the manpage load should still be balanced when
session handling is used, individual users will be bound to a single
server but it should alternate with each new connection.  Am I
misunderstanding session handling?

--
Thanks,
--Cameron Roberts


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[...]

Thanks for the response,  The site is actually live so the traffic is coming
in from all over the place.

I was thinking along the same lines and actually ignored the lopsided effect
during my testing for exactly this reason, I assumed since all the load was
coming from a handful of test servers I wasn't seeing realistic production
behaviour.  However the problem continued after we went "live" with it.

Thanks,
 --Cam Roberts

On Tue, Sep 30, 2008 at 4:55 PM, Alfonso Espitia <
aespitia(at)castleworldwide.com> wrote:
[...]

My config looks like your original one, except that the session stuff
was after the "backend" directive, instead of before.  I doubt that will
make a difference, but maybe someone else knows.

--Alfonso 

-----Original Message-----
From: interlnk(at)gmail.com [mailto:interlnk(at)gmail.com] On Behalf Of Cam
Roberts
Sent: Tuesday, September 30, 2008 5:15 PM
To: pound(at)apsis.ch
Subject: Re: [Pound Mailing List] load is not balanced when session
handling

Thanks for the response,  The site is actually live so the traffic is
coming in from all over the place.

I was thinking along the same lines and actually ignored the lopsided
effect during my testing for exactly this reason, I assumed since all
the load was coming from a handful of test servers I wasn't seeing
realistic production behaviour.  However the problem continued after we
went "live" with it.

Thanks,
 --Cam Roberts

On Tue, Sep 30, 2008 at 4:55 PM, Alfonso Espitia <
aespitia(at)castleworldwide.com> wrote:
[...]
[...]
300.[...]
pound(at)apsis.ch.[...]
pound(at)apsis.ch.[...]

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Please contact roseg(at)apsis.ch for questions.

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