On Wed, Jun 17, 2009 at 7:41 PM, Steve Totaro < [email protected]> wrote:
> > > On Wed, Jun 17, 2009 at 3:18 PM, John Todd <[email protected]> wrote: > >> >> On Jun 17, 2009, at 8:16 AM, Steve Totaro wrote: >> >> > Hi, >> > >> > Quick question to the real world. >> > >> > Approx what specs would I need on server to handle 95 ZAP or Dahdi - >> > > SIP gateway using G729 on the SIP to carrier side (nothing else, >> > just media conversion)? >> > >> > Does the latest Asterisk/DAHDI significantly improve these numbers >> > over say, Asterisk 1.2.X? >> > >> > Sure, there is plenty to read but nothing I could find quickly on my >> > exact needs that was clear and I want to be fairly sure before >> > ordering a server. >> > >> > Obviously load avg has something to do with it but CPU and mem seems >> > to be the biggest factors. >> > >> > -- >> > Thanks, >> > Steve Totaro >> > +18887771888 (Toll Free) >> > +12409381212 (Cell) >> > +12024369784 (Skype) >> >> >> [Digium hat off, ITSP (previous employer) hat on.] >> >> Not speaking for Digium on this one, but speaking from personal >> experience at another company. >> >> We could get 100 G.729 channels in a 2x3ghz P4 machine with plenty of >> CPU room to spare, 4+ years ago, and that rule of thumb served us >> well. This was for SIP (G.711<->G.729) but I can't imagine that DAHDI >> or Asterisk takes significantly more or less horsepower for this task >> now for the base transcoding load. >> >> JT >> >> --- >> John Todd >> email:[email protected]<email%[email protected]> >> Digium, Inc. | Asterisk Open Source Community Director >> 445 Jan Davis Drive NW - Huntsville AL 35806 - USA >> direct: +1-256-428-6083 http://www.digium.com/ >> >> >> >> > John, > > Thanks for the info. > > Can't go wrong with these in a cluster if you are correct. > http://www.surpluscomputers.com/348663/hp-dl140-proliant-dual-xeon.html > > I used to have a garden of seven (too small to be a farm) of Asterisk boxen > that were simple PRI to SIP gateways doing ulaw (no transcoding as far as > codec), and nothing else running, just a few lines in each conf file. > > They would run at ~65% CPU utilization with 95 channels in use on each box. > > This was the Asterisk, Zaptel, Libpri 1.2.X flavor. > > I wonder if anyone else has input on the CPU utilization of of a simple > PSTN <-> VoIP gateway based on Asterisk? > > I wonder how much of my observed 65% CPU utilization was because of software echo cancellation? If someone knows, I would appreciate any input. If not, I will follow-up with my own testing in this thread. -- Thanks, Steve Totaro +18887771888 (Toll Free) +12409381212 (Cell) +12024369784 (Skype)
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