convert mp3 to sln, this itself will give you quiet a big capacity boost. 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 >
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