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<p class=MsoNormal>Hello everybody.<o:p></o:p></p>
<p class=MsoNormal><o:p> </o:p></p>
<p class=MsoNormal><span lang=EN-US>I have been running some load tests on
IAX2, as we are finding out our future hardware investments.<o:p></o:p></span></p>
<p class=MsoNormal><span lang=EN-US><o:p> </o:p></span></p>
<p class=MsoNormal><span lang=EN-US>Here is the setup:<o:p></o:p></span></p>
<p class=MsoNormal><span lang=EN-US><o:p> </o:p></span></p>
<p class=MsoNormal><span lang=EN-US>We have three virtual machines.<o:p></o:p></span></p>
<p class=MsoNormal><span lang=EN-US><o:p> </o:p></span></p>
<p class=MsoNormal><span lang=EN-US>A: running SIPP and Asterisk 1.6.2.7<o:p></o:p></span></p>
<p class=MsoNormal><span lang=EN-US>B: running Asterisk 1.6.2.7<o:p></o:p></span></p>
<p class=MsoNormal><span lang=EN-US>C: running Asterisk 1.6.2.7.<o:p></o:p></span></p>
<p class=MsoNormal><span lang=EN-US><o:p> </o:p></span></p>
<p class=MsoNormal><span lang=EN-US>All of the Asterisks have been compiled
with as little modules and channel drivers as possible, etc. only SIP, Local
and IAX2, and about 4 dialplan functions.<o:p></o:p></span></p>
<p class=MsoNormal><span lang=EN-US><o:p> </o:p></span></p>
<p class=MsoNormal><span lang=EN-US>They are connected as this.<o:p></o:p></span></p>
<p class=MsoNormal><span lang=EN-US><o:p> </o:p></span></p>
<p class=MsoNormal><span lang=EN-US>A -> IAX2 -> B -> SIP -> C<o:p></o:p></span></p>
<p class=MsoNormal><span lang=EN-US><o:p> </o:p></span></p>
<p class=MsoNormal><span lang=EN-US>On the A machine, SIPP makes SIP calls to
the asterisk, which then dials server B through IAX, which then in turn dials
server C through SIP.<o:p></o:p></span></p>
<p class=MsoNormal><span lang=EN-US>The scenario is to have machine B as a IAX2
<-> SIP converter.<o:p></o:p></span></p>
<p class=MsoNormal><span lang=EN-US><o:p> </o:p></span></p>
<p class=MsoNormal><span lang=EN-US>Asterisk on machine A and B dies around 185
simultaneous channels, consuming all CPU on the machines, until they eventually
crash.<o:p></o:p></span></p>
<p class=MsoNormal><span lang=EN-US>Machine C, which is only running SIP,
consumes around 30% CPU at the 185 channel mark.<o:p></o:p></span></p>
<p class=MsoNormal><span lang=EN-US><o:p> </o:p></span></p>
<p class=MsoNormal><span lang=EN-US>This result gutted me somewhat, as 185
channel is a really low figure. And 185 channels is where it crashed, so 160
channels would probably be a safer estimate per machine.<o:p></o:p></span></p>
<p class=MsoNormal><span lang=EN-US>When using only SIP we have been able to
run over 860 calls on a single Asterisk 1.6, and the factor that stopped using
more channels, was our Cisco PIX506 firewall crashing.<o:p></o:p></span></p>
<p class=MsoNormal><span lang=EN-US><o:p> </o:p></span></p>
<p class=MsoNormal><span lang=EN-US>Ive read several places, that IAX2 scales
really horribly, and having confirmed that, I am wondering if anybody has a
solution for this.<o:p></o:p></span></p>
<p class=MsoNormal><span lang=EN-US><o:p> </o:p></span></p>
<p class=MsoNormal><span lang=EN-US>My own idea was to develop a IAX2 -> SIP
procotol converter. Ive worked somewhat with the IAX2 protocol in code, and it
should absolutely be possible, but unfortunately, i do not have the time for
such a project.<o:p></o:p></span></p>
<p class=MsoNormal><span lang=EN-US><o:p> </o:p></span></p>
<p class=MsoNormal><span lang=EN-US>Any other ideas?<o:p></o:p></span></p>
<p class=MsoNormal><span lang=EN-US><o:p> </o:p></span></p>
<p class=MsoNormal><span lang=EN-US><o:p> </o:p></span></p>
<p class=MsoNormal><span lang=EN-US style='font-size:10.5pt'>Med venlig
hilsen/Kind Regards<o:p></o:p></span></p>
<p class=MsoNormal><span lang=EN-US style='font-size:10.5pt'><o:p> </o:p></span></p>
<p class=MsoNormal><span lang=EN-US style='font-size:10.5pt'>Jon Leren
Schøpzinsky<o:p></o:p></span></p>
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