[Asterisk-Users] XEON or not

[Nir Simionovich]

In general terms, all of the answers are correct and valid, but you need
to take into considerations a few more issues. 

A. If you are utilizing SIP connections to the asterisk box, you need to
remember that SIP will generate traffic and I/O consumption even in idle
state. The more SIP connections, the more I/O you will use on the NIC.

B. The general rule of "no translation=no CPU" is correct in general
terms, but you must remember that applications like Voice Mail,
ZapBarge, even playback and background require CPU usage. For example,
and I have no idea why, the SayNumber application uses recursion for
some languages, ending up in more memory allocation. 

C. If you will be doing H323 to SIP conversions, take into consideration
that it is performed via a Proxy function on Asterisk - This is not
signal switching, the packets are fully transcoded and proxied.

D. Working with AGI's will introduce a new issue of concurrent open
files, depending on your application. Make sure to close each file you
use once finishing with it, if not, you will end up with multiple file
descriptors open, and Asterisk will fly out of the window due to "too
many open files" error.

E. If working with a MySQL database, make sure you utilize the local
machine unix socket for MySQL, if not, MySQL connections will take IP
sockets, ending up in more I/O used. 

Now, I admit that each of the above is fairly lite, however, the sum up
of all aspects together on the same box - makes up a very unhappy * box.

Nir S

On Mon, 2005-01-24 at 10:32 -0500, Jon Bebeau wrote:
> Hello,  Your on the right track.  No translations = no (well, not much) CPU 
> load.  If all your doing is pushing packets, the NIC will become more 
> important than the CPU.  Don't forget, MOH, auto response and VM will take 
> some load as these may need to be transcoded, unless you save them in the 
> same codec (format) as the native voice traffic.  For under 20 concurrent 
> calls, a P4 1Ghz would do.
> 
> Jon
> ----- Original Message ----- 
> From: "Daniel Nyström" <daniel.nystrom at westel.se>
> To: <asterisk-users at lists.digium.com>
> Sent: Monday, January 24, 2005 10:19 AM
> Subject: [Asterisk-Users] XEON or not
> 
> 
> Are there much performance differences when using XEON or not?
> In my case, I will go with muLaw both in and out of Asterisk. Are there 
> really any processing at all if it's using same codec all the way?
> 
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