[Asterisk-Users] Mosix?

[Darran Wilson]

Thanks for the info!  Actually I was planning on implementaing Asterisk
mainly as a H323 system in a "Helpdesk" scenario with Netmeeting, including
the desktop sharing aspect and I was concerned if I would be able to cluster
when the system needs to be expanded to avoid new build outs and additonal
config time.   Thanks again for the info!


laters,

darran

----- Original Message ----- 
From: "Steven Critchfield" <critch at basesys.com>
To: <asterisk-users at lists.digium.com>
Sent: Wednesday, April 30, 2003 3:27 PM
Subject: Re: [Asterisk-Users] Mosix?


> On Wed, 2003-04-30 at 12:32, Darran Wilson wrote:
> > Has anyone tried Asterisk on a MOSIX cluster?  My concern is if there
> > is any adiitonal laltency when when the processes are moved from on
> > node to another. Anyone tried it yet?
>
> I think Tilghman went a little light on this. First you need to ask why
> do you want it on a mosix cluster. Telephony isn't exactly a application
> you would expect to try and cluster. Most of the time you are needing
> direct access in realtime with hardware. The cost to overcome the
> hurdles of the latency introduced would be too high for it to be
> feasable. Secondly, asterisk is a multi threaded application that uses
> shared memory and therefore couldn't migrate from node to node anyways.
> It reminds me of an evening trying to get dnetc to migrate across a 4
> node mosix cluster. It would just migrate the whole proccess to the
> fastest node, and stay there. This is the behaviour I would expect from
> asterisk.
>
> If you are trying to handle larger channel numbers, or more VoIP
> compression... Hardware is cheap, buy fast machines. Next asterisk
> supports some nice functions to distribute the switching out as Tilghman
> pointed out. Any machine you deploy should be able to handle at least a
> T1 of voice, make them all contact a central switch with your dialplan
> worked out, then it can redirect to the proper endpoints. This allows
> you to have a good bit of central configuration, but one node other than
> the switch won't take down the whole phone system.
> -- 
> Steven Critchfield  <critch at basesys.com>
>
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