On Fri, Aug 19, 2011 at 6:39 AM, Jim Boykin <boykin...@gmail.com> wrote:
> convert mp3 to sln, this itself will give you quiet a big capacity boost. > How does sln boost capacity? > > On Wed, Aug 17, 2011 at 12:21 PM, Morten M. Hansen <m...@bellcom.dk> wrote: > > On 2011-08-16 21:14, Warren Selby wrote: > >> Is it going to be just one mp3 stream that is shared across all users > (I.e everyone hears the same thing at the same time), or is it 1000 separate > mp3 streams (everyone always starts at the beginning of whatever they are > hearing). > > > > It's a shared stream. When testing now, new listeners doesn't spawn new > > mpg123 processes. > > > >> Are you going to have reliable timing generation on an EC2 instance, > since IAX streams and music on hold playback will sound bad if the timing > isn't good. > > > > We are using the zaptel and ztdummy kernel module, and we haven't > > noticed any problems with the audio quality yet. Should we be worried > > about this when the load gets higher? > > > >> Will you have sufficient bandwidth allocated to you for that many > simultaneous calls? > > > > Good point. We will have to do some calculation and research on what EC2 > > offers here. > > > >> Is there going to be any codec transcoding going on? Can you generate > your streams in the preferred codec, instead of mp3? > > > > The source is an icecast server streaming mp3. I haven't figured out a > > way to get around that. But from what I understand its just one > > reencoding for all the listeners. > > > >> I think if you're just using one stream spread across all the callers, > you'll have much better performance from the system as a whole. You may want > to look at the quality differences between a SIP trunk and an IAX trunk as > well. > > > > I had a talk with our IAX2 trunk provider and they told me that we could > > expect better performance from a SIP trunk. They also had a limit on > > 2000 channels, so we may have to look for another trunk. > > > > Are there any tools or services to simulate a lot of IAX2 or SIP users > > that you can recommend? How do you test how many users an asterisk > > system can handle? > > > > Thank you for taking the time to reply. > > Morten > > > >> Thanks, > >> --Warren Selby, dCAP > >> > >> On Aug 16, 2011, at 10:16 AM, "Morten M. Hansen" <m...@bellcom.dk> > wrote: > >> > >>> Hi > >>> > >>> I'm hoping someone could comment on how our setup will perform under > >>> larger loads. > >>> Its a quite simple setup, with Asterisk 1.6.2 on Debian 6 on an EC2 > large > >>> instance (7GB RAM, 2 virtual cores with EC2 compute units). > >>> Using an IAX2 trunk we offer normal phones to dial in and listen to a > mp3 > >>> stream using music on hold. > >>> > >>> If we wanted to let 1000 users listen to the stream at the same time, > >>> would that be possible? What limits will we hit? How about 10000 users? > >>> > >>> Regards > >>> Morten > >>> > >>> > >>> -- > >>> _____________________________________________________________________ > >>> -- Bandwidth and Colocation Provided by http://www.api-digital.com -- > >>> New to Asterisk? Join us for a live introductory webinar every Thurs: > >>> http://www.asterisk.org/hello > >>> > > > > -- > > _____________________________________________________________________ > > -- Bandwidth and Colocation Provided by http://www.api-digital.com -- > > New to Asterisk? Join us for a live introductory webinar every Thurs: > > http://www.asterisk.org/hello > > > > asterisk-users mailing list > > To UNSUBSCRIBE or update options visit: > > http://lists.digium.com/mailman/listinfo/asterisk-users > > > > -- > _____________________________________________________________________ > -- Bandwidth and Colocation Provided by http://www.api-digital.com -- > New to Asterisk? Join us for a live introductory webinar every Thurs: > http://www.asterisk.org/hello > > asterisk-users mailing list > To UNSUBSCRIBE or update options visit: > http://lists.digium.com/mailman/listinfo/asterisk-users > -- Regards, Abdul Basit | +92 32 1416 4196 | +92 30 0841 1445
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