[Freeswitch-users] Question about large confeerence

Duvid Rottenberg adrottenberg at gmail.com
Mon Apr 23 14:28:09 UTC 2018

I have a similar scenario, and my solution was to create several
conferences. I have one master conference, that serves to connect all
sub-conferences. So when a user calls in to the conference I add him to a
sub conference, then I do an outdial to an extension that joins the sub
conference to the master conference (this connection should not be muted).
Once the sub conference has 250 participants, I create a new sub
conference. I control all of this via ESL, this also requires some
additional logic to handle conference commands, as I need to make sure it
propogates to all sub conferences.

The advantage of this approach is that instead of having one loop running
on 1 CPU core looping through all listeners we now have multiple conference
loops running on different cores. The issue with large conferences is that
the conference loop runs every 20 ms by default and the main conference
loop is not (and probably can't be) multi-threaded.

Since on any large conference, there will most likely be only a handful of
speakers, the best solution would probably be to optimize mod_conference to
have a separate list of unmuted participants and only loop through those,
but I was afraid to undertake such a change myself.

On Thu, Apr 19, 2018 at 12:09 PM, Abaci B <abaci64 at gmail.com> wrote:

> Hi,
> I'm trying to set up a large audio conference of over 1000 users where
> only 1 or 2 users are talking and the rest are just listening, but after
> 600-700 users the CPU usage gets too high and the audio gets choppy, I
> understand that mod_conference is not optimized for my use case but was
> wondering if someone has any suggestions on what can be done to optimize
> for my use case.
> I was also thinking that maybe there is a  better alternative for what I
> look for, such as having just the talkers on the conference and the
> listeners should listen to it via mod_local_stream or maybe use something
> like eavesdrop for the listeners but not sure if and how much performance I
> would gain.
> Thanks for any help or input
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