[Asterisk-Users] Asterisk scalability?

[Scott Stingel]

Hi Tommy-

I should have been clearer in the descriptions of my testing.  I was testing
only the PSTN load handling of asterisk using various models of Digium Quad
PRI cards (400, 405, 410, etc).  My testing did not add the CPU load which
would be presented by the H.323, SIP, etc.

So, you're right, one would expect lower results (ie: the ability to handle
fewer lines) once those protocols were factored in.

I am surprised that you're only able to get a single T1's worth however -
that seems low given what others have claimed from time to time on here.

Apologies for not being clear

Scott



Scott M. Stingel 
Emerging Voice Technology Inc.
Palo Alto, California and London, England

Email:          scott at evtmedia.com  
URL:            www.evtmedia.com  


-----Original Message-----
From: asterisk-users-admin at lists.digium.com
[mailto:asterisk-users-admin at lists.digium.com] On Behalf Of T. Chan
Sent: Sunday, August 01, 2004 1:37 PM
To: asterisk-users at lists.digium.com
Subject: RE: [Asterisk-Users] Asterisk scalability?

Hi, Scott

Thanks for your information. I have worse luck in load testing with
asterisk.

I have tried both SIP and H323 inbound calls and terminating on PSTN PRIs. I
am using a single Xeon 2.8G chip and 512M Ram and in both cases, once it
gets more than a T1, call quality starts to degrade with choppiness, and
Asterisk becomes very unstable and resets itself like every 5-15 minutes.

Can you let me know more about your tests, like which version of Asterisk
are you using for the test, and which version of H323 and your computer
configuration please, thanks a million

TC

-----Original Message-----
From: asterisk-users-admin at lists.digium.com
[mailto:asterisk-users-admin at lists.digium.com]On Behalf Of Scott Stingel
Sent: Saturday, July 31, 2004 2:16 PM
To: asterisk-users at lists.digium.com
Subject: RE: [Asterisk-Users] Asterisk scalability?


Hi Roy-
I've done a lot of load testing with asterisk and TE410P's.

My guess, with no transcoding, is that you might be able to handle 8 E1's
max on the PSTN side absolute max (ie: 2 TE410P's).  This assumes you have a
fast processor.    If you're using T1's, scale these numbers up accordingly,
as there are fewer channels per span.

If this answer is lower than you might expect, consider that every byte of
data has to pass through the processor.  The 410's are capable of
bus-mastering, and so are an improvement over the T400P's, but still I think
you run into horsepower limitations.

Regards
Scott

Scott M. Stingel
President,
Emerging Voice Technology, Inc.
Palo Alto California & London England
www.evtmedia.com

-----Original Message-----
From: asterisk-users-admin at lists.digium.com
[mailto:asterisk-users-admin at lists.digium.com] On Behalf Of Roy Sigurd
Karlsbakk
Sent: Saturday, July 31, 2004 8:25 AM
To: Asterisk Users
Subject: [Asterisk-Users] Asterisk scalability?

Hi

I plan to setup an asterisk box to function as a SIP gateway forwarding lots
of calls to/from a backend of several other asterisk boxes, each with a
TE410 card for PSTN connectivity.  It will only gateway the calls into the
PSTN gateways. No transcoding is planned - only plain ALAW. How many
concurrent calls would you think this can handle? I'm asked to plan a system
that can handle >1000 concurrent calls...

thanks for any input

regards

roy

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