asterisk users - Oct 2007 - Is there real benefits on a SMP machine for Asterisk?

Hi list,

I'm now considering to buy a new server for an Asterisk installation, since
I've been kindly
advised<http://lists.digium.com/pipermail/asterisk-users/2007-October/198146.html>not
to use an old server for a mission critical app...

Well, playing around in Dell's, HP's and IBM's online stores,
I've noticed a
lot of Discounts or even FREE upgrades from Dual to Quad Core CPU's, and I
cant believe that Dell offers FREE upgrades in some cases from One to Two
CPU's (at least in the PowerEdge 2950 and 2970 models). I've chosen the
29xx
line of servers for the redundant power supply, since it is really important
to keep the uptime of the PBX as high as possible!

At this point I was wondering if Asterisk gets real benefits on systems with
several cores (up to 8 in Dell PE2950) for a system that will handle up to
35 simultaneous SIP call with 10 FXO ports and 2 FXS for analog phones/fax
(Sangoma A400D PCI card).

Thanks!

Raul
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> At this point I was wondering if Asterisk gets real benefits on systems
> with several cores (up to 8 in Dell PE2950) for a system that will handle
> up to 35 simultaneous SIP call with 10 FXO ports and 2 FXS for analog
> phones/fax (Sangoma A400D PCI card).
I suppose that yes. Asterisk uses pthread, and it should distribute load 
across multiple cores.

However, i doubt that you will need that much for 35 simultenous calls.

I have 8-core system that has web interface + sql + java + some other stuff 
running, and at 30 simultenous calls i get loadavg maximum of 3.

Regards,
Atis


-- 
Atis Lezdins
VoIP Developer,
IQ Labs Inc.
atis at iq-labs.net
Skype: atis.lezdins
Cell Phone: +371 28806004
Work phone: +1 800 7502835

On 10/11/07, Ra?l G?mez C. <raulgomez at cantv.net>
wrote:
>
>
> At this point I was wondering if Asterisk gets real benefits on systems
with
> several cores (up to 8 in Dell PE2950) for a system that will handle up to
> 35 simultaneous SIP call with 10 FXO ports and 2 FXS for analog phones/fax
> (Sangoma A400D PCI card).
For this load level (even with high-load transcoding), a multi-core
machine certainly would not be needed.  That said, it certainly
wouldn't hurt anything to add on extra cores, especially if they're
free ;-)

-erik