[Kamailio-Users] Architecture with load-balancing (dispatcher module)

[Ovidiu Sas]

On Thu, Oct 23, 2008 at 8:25 AM, Pascal Maugeri
<pascal.maugeri at gmail.com> wrote:
>
>
> On Thu, Oct 23, 2008 at 12:16 PM, Alex Balashov <abalashov at evaristesys.com>
> wrote:
>>
>> Any "frontal application-level switch" would simply have the same
>> liability.
>
> right.
>>
>> Kamailio is a very high-throughput proxy that can handle huge amounts of
>> call setups per second.  I think you can count on that.
>
> Yes but you may need to use the power of all your load-balancer nodes. I
> believe we can expect 10K transactions/seconds on a single load-balancer
> node, but if you need to handle more traffic, load balancer node may be a
> bottleneck.

I am doing between 4-5K simultaneous transactions (100-150 calls per
second) on a Xeon quad core @3.20GHz and the overal cpu load is under
5%.  I don't think that your load-balancer node will be a bottleneck.
You just need a properly tunned config file.

>>
>> Failing over around the load balancer node to a secondary load balancer or
>> distributing the traffic among multiple load balancers is a job best left to
>> the sending endpoint.  For example, a DID origination provider's switch or
>> SBC can be set up to fail over calls to a different IP endpoint for your SIP
>> trunk if no response is received within a certain amount of time.  That is
>> how this is typically done.  At some point you've got to say that you've
>> done all you can do, and it's up to the other side.
>
> Thanks Alex, it's a good point.
>
> -pascal
>
>>
>> Pascal Maugeri wrote:
>>
>>> Hi
>>>
>>> I was wondering how to achieve an architecture with two or more active
>>> load-balancer nodes (kamailio+dispatcher module).
>>>
>>> I have read how to setup two dispatcher nodes, one node as a master and
>>> the other one as a backup.
>>>
>>> The backup node doesn't process any traffic until master fails. But how
>>> to make the traffic being processed by both load-balancers ? In the case for
>>> instance the capacity of single node is not enough to process all incoming
>>> traffic. Is there any recommended configuration (eg. using frontal
>>> application-level swith)
>>>
>>> Regards,
>>> Pascal
>>>
>>>
>>> ------------------------------------------------------------------------
>>>
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>>
>>
>> --
>> Alex Balashov
>> Evariste Systems
>> Web    : http://www.evaristesys.com/
>> Tel    : (+1) (678) 954-0670
>> Direct : (+1) (678) 954-0671
>> Mobile : (+1) (706) 338-8599
>
>
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