asterisk users - Apr 2006 - Asterisk Performance 350 Concurrent ChannelsWorking Nicely

Is this with Asterisk in the RTP stream? Is it doing any transcoding?
> -----Original Message-----
> From: JR Richardson [mailto:jmr.richardson@gmail.com]
> Sent: Tuesday, April 18, 2006 9:34 AM
> To: asterisk-users@lists.digium.com
> Subject: [Asterisk-Users] Asterisk Performance 350 Concurrent
> ChannelsWorking Nicely
> 
> 
> Hi All,
> 
> This is a performance update.  I have built appliance type servers
> with the following specs:
> 
> Motherboard Asus P5MT-M
> Memory 1Gig DDR2
> No hard drive, running in Ramdrive but using Sandisk Compact Flash to
> hold compressed image and /var directory
> Processor 3.2 Gig Pentium 4, HT Turned Off
> 2 on-board Gig NICs
> 
> I'm using asterisk with looping call test configs to play audio and
> using 3 of the same spec servers to pound calls through 1 server.  I
> managed to get 350 concurrent calls through with perfect audio
> consistently with ~20% idle processor load.  Anything above that and
> things start breaking up.  Using the latest 1.2.6 stable asterisk, I'm
> running into a limit of 276 SIP calls and no more.  IAX calls can go
> 400+, so I test with combination 200+ SIP calls and the rest IAX and a
> combination of more and less SIP and IAX calls.
> 
> Memory usage never goes over 256Meg, not sure why.
> 
> Interesting, findings are very consistent with other performance
> testing that has been done over the years, Astertest and the like.
> 
> HT turned on, SMB loaded in the kernel gave ~20% performance increase,
> BUT, using 425 + channels gave very inconsistent results, choppy
> audio, calls dropped, no audio, call setup time slowed.  Good results
> below that mark, but not enough to warrant using full time.  I'd
> rather build for stability and reliability than for all-out
> performance.
> 
> Not too shabby, I'm very happy with this setup.
> 
> JR
> --
> JR Richardson
> Engineering for the Masses
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