[OpenSIPS-Users] OpenSips Load balancer. - Overcome limitations of Call Driven Load Balancing

[Chandan PR]

Thanks for the response Jon.
Let me have a look at it.

On Fri, Jul 24, 2020 at 7:42 PM Jon Abrams <ffshoh at gmail.com> wrote:

> Hi Chandan,
>
> There may be something else purpose built for this, but you can use
> the dialog profiles to track and limit the port usage:
>
>     set_dlg_profile("outcarrier","$avp(out_carrier_id)");
>
>     if ($avp(out_max_call_limit) > 0)
>     {
>         set_dlg_profile("profile","$avp(out_qos_profile_id)");
>         if
> (get_profile_size("profile","$avp(out_qos_profile_id)","$var(out_gw_count)"))
>         {
>             if ($var(out_gw_count)>$avp(out_max_call_limit))
>             {
>                 xlog("LIMIT: Call $ci - Max call limit hit by
> $avp(src_addr) on QosProfile $avp(out_qos_profile_id) to gw
> $avp(out_gw_id)\n");
>                 return(-1);
>             }
>         }
>     }
>
> On Fri, Jul 24, 2020 at 8:55 AM Chandan PR <chandan.pr at webshar.org> wrote:
> >
> > Hello Everyone,
> >
> > Currently, we are using Open Sips Load balancer in Call Driven load
> balancing.
> >
> > Our scenario is as below:
> >
> > D - Total Destinations configured at OpenSips
> > P - No of Ports/Sessions Each Destination can handle concurrently
> > C - Total Capacity = D*P
> >
> > We have a Call Loader which loads calls to OpenSips at C and as when the
> result comes further calls get loaded.
> > For some reason, if any destination is not in the right state and sends
> error responses without accepting calls, this introduces a drain scenario.
> > In the drain scenario where all new calls are given to the faulty
> destination as it has more availability.
> >
> > We are currently handling this by
> >
> > Running the loader at 80% of C
> > Disabling the destination in Opensips if 75% of the calls fail for the
> particular destination (Attached loadbalancer.cfg file).
> >
> >
> > But even in this case, it is possible that may call error out as the
> destination is free and calls are loaded.
> >
> > We would like to avoid this scenario to the max possible extent by
> limiting the number of calls we send to this particular destination.
> >
> > Couple of options I see are as below:
> >
> > Wait for a brief period before sending the response to loader when the
> error happens
> > Make OpenSips aware of the destination capacity and adjust ports
> accordingly
> >
> > Write a custom script to poll destination capacity and use MI functions
> to adjust accordingly
> > Or is there any possibility to integrate similar to FreeSwitch driven
> routing
> >
> > Are there any other possibilities of adjusting the OpenSips capacity
> dynamically or make it limit the calls sent to the particular destination?
> >
> > --
> >
> > Regards,
> > Chandan Ravishankar
> > _______________________________________________
> > Users mailing list
> > Users at lists.opensips.org
> > http://lists.opensips.org/cgi-bin/mailman/listinfo/users
>
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>


-- 

Regards,
Chandan Ravishankar <https://about.me/chandanpr>
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