[OpenSIPS-Users] using TCP/TLS in a large scale deployment

[Bogdan-Andrei Iancu]

Hi Jayesh,

There are 2 aspects here :
     - first, configure proper limits when starting OpenSIPS - like max 
number of fds per process, etc.
     - secondly, when comes to opensips itself, you need to look into :
         * enough memory (TCP uses a lot)
         * set proper timeouts in TCP (connect, write, read timeouts) to 
avoid blocking
         * properly handle the TCP lifetime to get to a compromise 
between the number of ongoing connections and seting/closing connections
         * really good control over when OpenSIPS should open new TCP 
conns - you can do this from script, depending on the target (like never 
try to open conns towards end-user, let them connect to you).

Regards,

Bogdan-Andrei Iancu
OpenSIPS Founder and Developer
http://www.opensips-solutions.com

On 10.09.2014 14:55, Jayesh Nambiar wrote:
> Hello,
> I am in process of designing opensips which can handle a million 
> users, hypothetically 200,000 registrations and 500CPS capacity. I've 
> been reading a lot and learnt that TCP design is blocking and not 
> suitable for huge volumes.
> My requirement was to have TLS between endpoints and Opensips and 
> hence riding over TCP is the only option. I needed some expert 
> suggestions on what things should be taken care of when planning a 
> large deployment over TCP.
> I have built similar stuff on UDP and I trust it heavily as it has 
> performed perfectly as expected. But when it comes to TCP I'm a bit 
> clueless.
> I've read about lot of global parameters that is now available for 
> asynchrous tcp operations. Is it really helpful when planning for 
> scalable environments??
>
> Thanks for any suggestions !!
>
> W/regards,
> Jayesh
>
>
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