[Xorp-hackers] Multiple protocol instances within the same process.

[Ben Greear]

RTP Techie wrote:
> Xorp-Hackers,
>  
>
> I saw a discussion on running multiple instances/processes of the same 
> protocol within the same host machine.
>
>  
> But I was interested in running multiple instances of the same 
> protocols within the same processes.  Like within OSPFv2 process, I 
> would want to run 50 ospfv2 routing engines.
>
> They should be just interdependent instances and don't need to know 
> each other and only learn about each other through the normal 
> protocols interactions. The reason is that I want to emulate a network 
> instead of just a distributed router. If I'm trying to run 50 or even 
> few hundreds processes on my system, it won't be the desired operations.
>
>  
>
> I know that it is not the model that is currently supported, but I 
> want to get some directions as where/how to start.  Just reading the 
> design documents, the first thing that I see the issue is the XLR 
> target. From what I can tell, a target is associated wit the process, 
> in order words, I cannot address a particular instance within the process.
>
>  
>
> Beside that from the OSPF or any protocol implementation point of 
> view, would there is any issue as well?
>
Using one set of xorp processes per virtual router, we (Candela) can 
support 50+ on a high end machine ( 2 x 4-core system).

In my opinion, the thing to do for more scalability would be to have all 
of the xorp processes for a single router
in the same process (not 4+ processes like it is now).  This would 
probably be a lot easier to support than
having multiple virtual routing engines inside a single process, and 
would cut down on a lot of extraneous message
passing between processes.

Thanks,
Ben

-- 
Ben Greear <greearb at candelatech.com> 
Candela Technologies Inc  http://www.candelatech.com