Regarding high availability. I admit that in ten years of deployments I have 
never heard a single customer asking for this. They were rather asking for 
having multiple relays in multiple data centers because losing one IP was in 
most cases associated with complete connectivity failure to that data centre 
and a single IP failover was something that even if possible the costs far 
exceeded the benefits. A single IP address going down out of a larger 
connectivity issue context is such a rare occurrence, practically I don’t 
remember ever hearing a customer complaining about such a thing.

In my opinion addressing new features like what rtp engine solves with regards 
to interoperability in more real time scenarios is a smarter investment rather 
than optimising in places were the benefits can be hardly measurable. Not to 
mention that the term "carrier-grade” like its predecessor "five times 9 
availability" is slowly exiting the vocabulary and is being replaced with 
webRTC ready and other newer concepts.

My two cents

Adrian

On 28 May 2014, at 09:35, [email protected] wrote:

> Well, the way we implemented ‘persistence’ was by applying a different 
> thinking. The goal is to allow live software updates without disrupting 
> traffic. With MediaProxy one can shutdown gracefully a relay by allowing it 
> to carry on finishing existing calls and then shutdown while the traffic is 
> handled by other relays. This way one can upgrade the software on a relay 
> farm without dropping a single call.
> 
> Adrian
> 
> On 28 May 2014, at 03:04, Bogdan-Andrei Iancu <[email protected]> wrote:
> 
>> Saul,
>> 
>> the "carrier grade" features are mainly referring to HA and 
>> persistenceacross restarts.
>> 
>> Regards,
>> 
>> Bogdan-Andrei Iancu
>> OpenSIPS Founder and Developer
>> http://www.opensips-solutions.com
>> 
>> On 27.05.2014 23:07, Saúl Ibarra Corretgé wrote:
>>> On May 27, 2014, at 4:29 PM, Bogdan-Andrei Iancu wrote:
>>> 
>>>> Brett, you put the finger on the wound :)
>>>> 
>>>> I looked around to other alternatives (to avoid re-inventing the wheel) - 
>>>> like mediaproxy or rtpengine - and I saw no carrier-grade features in the 
>>>> there  - please correct me if I'm wrong.
>>>> 
>>>> I'm looking to see if the problem is correctly identified and if there is 
>>>> a large consent in the community about this need. As we would like to 
>>>> through some resources into this (hopefully other parties too), as ideally 
>>>> we should be going in the right direction :)
>>>> 
>>> What "carrier grade" features are those?
>>> 
>>> --
>>> Saúl Ibarra Corretgé
>>> AG Projects
>>> 
>>> 
>>> 
>>> 
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