[OpenSIPS-Users] [OT] about scalability, experiences, demands

Adrian Georgescu ag at ag-projects.com
Fri Nov 14 16:39:15 CET 2008

 From a customer point of view is great that you are satisfied with  
the software.

Myself as a platform vendor having to satisfy the needs of multiple  
customers I can only concur with Bogdan that the curent design has  
flaws inherited from the original requirements and fixing them one by  
one by developing or improving modules to navigate around them is not  
the most efficient way forward.

A consistent core with a generic API to a higher level application  
that does not depend much on the core version and where a programming  
language chosen by the customer can be used is much more future proof  
then patching endlessly the existing code with lose modules and having  
to rewrite the configuration with every major version upgrade.

Having two projects and two ways to achieve the same goals may help  
the customers in the future.


On Nov 14, 2008, at 2:59 PM, Henning Westerholt wrote:

> Hello all,
> recently some statement came to my attention that "there is a common  
> consent
> that the current design/architecture of [..] OpenSER (inherited from  
> SER) is
> no longer able to deliver and to meet the present requirements and  
> demands".
> I don't want to argue that much about this opinion, in fact the  
> demands to a
> Voice over IP solution depends very much on the certain setup. But i  
> want to
> share some details from my experiences in developing and operating a  
> big VoIP
> infrastructure here at 1&1.
> We've about 2 million customers on our platform, that uses over 5  
> million
> individual numbers and terminate about 1 billion minutes per month.  
> We're
> able to provide a good service with the actual architecture of OpenSER
> without any real problems. Of course there is always some room for
> improvements, but so far the main challenges we faced were not in the
> scalability or performance areas. More important issues are e.g. the  
> inherent
> complexity of the SIP protocol and the maintainance of a good quality
> assurance and integration process.
> We started some years ago with OpenSER 0.9.5, which we then extended  
> a lot in
> house. For example we implemented more than 25 own modules, a own path
> implementation, did a lot of bug fixing and workarounds for certain  
> problems
> we've found. We're able to reduce this amount of proprietary code a  
> lot in
> the past, because of progress in the OpenSER development,  
> intregration of
> our "key" modules and a lot of other contributions. We're using now  
> something
> between OpenSER 1.3 and Kamailio 1.4 with only a few private  
> extensions.
> So in my opinion the actual design of our server is not "[..] an  
> inevitable
> dead-end that needs to be avoided.". I rather think that we'll be  
> able with
> continuing improvements to tackle the upcoming challenges well,  
> especially as
> we will work together in the future with the SER developers in  
> improving
> important areas of this software.
> But this is just my personal opinion, everybody is of course free to  
> have
> their own position.
> With best regards,
> Henning Westerholt
> -- 
> Henning Westerholt - Development Consumer Products / DSL Core
> 1&1 Internet AG, Ernst-Frey-Str. 9, 76135 Karlsruhe, Germany
> Vorstände: Henning Ahlert, Ralph Dommermuth, Matthias Ehrlich, Thomas
> Gottschlich, Robert Hoffmann, Markus Huhn, Hans-Henning Kettler,
> Dr. Oliver Mauss, Jan Oetjen - Aufsichtsratsvorsitzender: Michael  
> Scheeren
> Amtsgericht Montabaur / HRB 6484
> _______________________________________________
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