[OpenSIPS-Devel] New OpenSIPS design and load balancing

[Bogdan-Andrei Iancu]

Hi Aron,

I find very interesting this idea and to be honest it is not the first 
time - I got the same idea from different sources (in different 
context), so, I would say it is not a singular case for such a system.

Could you please upload all these (you could simple copy and paste this 
text) on the design page ? - 
http://www.opensips.org/index.php?n=Development.NewDesign - make a new 
section for it.

Thank you and regards,
Bogdan

Aron Rosenberg wrote:
> We have been doing a lot of R+D work on making OpenSIPS work in a Load
> Balancer environment and some of the issues that we are facing would be
> interesting to design into the new core.
>
> The usage of Shared Memory to cache data in various modules makes it
> difficult to scale these modules to run on several physically separate
> nodes. We have contemplated using DB only mode, but the performance of
> this is subpar and rapidly becomes a DB scaling issue.
>
> One of the items that might be interesting to think about would be a new
> class of memory/object storage that I will call "Global Memory". Global
> Memory could be a key/value storage system for data which modules need
> to create/access/modify/update that is Dialog level rather than
> transactional level. Global Memory could be backed by something like
> memcached.
>
> Most modules that build internal caching lists from shared memory could
> be converted to this new system. Usrloc, registrar, presence.
>
> Shared memory would then be used for single node only processing such as
> transactional memory, or local copies of module data that does not
> change. The load balancers that we are working with provide node level
> SIP transaction persistence.
>
> -Aron
>
> Aron Rosenberg
> SightSpeed Inc.
>
> -----Original Message-----
> From: devel-bounces at lists.opensips.org
> [mailto:devel-bounces at lists.opensips.org] On Behalf Of Bogdan-Andrei
> Iancu
> Sent: Friday, November 07, 2008 4:32 AM
> To: users at lists.opensips.org; devel at lists.opensips.org
> Subject: [OpenSIPS-Devel] RFC: new opensips design
>
> Hi all,
>
> As previously stated, there is a common consent that the current 
> design/architecture of OpenSIPS/OpenSER (inherited from SER) is no 
> longer able to deliver and to meet the present requirements and demands 
> for OpenSIPS future evolving. It is simply an inevitable dead-end that 
> needs to be avoided.
>
> Why? - I made a summary here - 
> http://www.opensips.org/pmwiki.php?n=Development.NewDesign#toc1
>
> I guess all of you are aware of the critical problems like blocking DB 
> or RADIUS, blocking DNS, lack of scaling, too complicated scripting, 
> message changes processing , etc.
>
> To be able to deliver a solution that will be able to satisfy the the 
> growing complexity and scale of the SIP world, a new radical design is 
> needed. It will be process of intensive thinking and work, but the 
> result will be a license for the future.
>
> As a first step of this laborious process, collecting feedback from all 
> of you, about the is missing, what are your wishes, about the 
> known/unknown limitations, etc I just open an new web section where we 
> can compile all this information.
>
> It is not a request for solution, but a request for current problems! We
>
> need to know all the problems that people facing in order to come up 
> with a design that will solve them all.
>
> Please visit:
>     http://www.opensips.org/pmwiki.php?n=Development.NewDesign
>
> and freely post there - any feedback is a valuable input and investment 
> in this project.
>
> Thanks you,
> Bogdan
>
>