asterisk users - Mar 2006 - RE: [on-asterisk] containers, virtualization, and high availability

I've been trying out asterisk on xen myself. One thing to note for
anyone that is experimenting that by default the Xen kernel runs at
100hz. To use  ztdummy you need a 1000hz source so you need to recompile
the dom0 and domU kernels with 1000hz.

If remember correctly you also need to set CONFIG_CRC_CCITT=y in the
kernel as well.

I have not tested the service migration but it does sound interesting.
I'm interesting in trying to get DRDB to work between machines.

Thanks
John

-----Original Message-----
From: simon@uc.org [mailto:simon@uc.org] 
Sent: Thursday, March 02, 2006 4:58 PM
To: TAUG
Subject: [on-asterisk] containers, virtualization, and high availability

I've been meaning to try out migrating a running Xen machine running
asterisk from one computer to another to see if there's any call
interruption. My rudimentary ping/ssh tests have been successful,
showing
no interruption of service.

Can you migrating a running container from one computer to another with
Solaris 10? I know it's supported in VMWare ESX($$$), and Xen.

The feature I'm really looking foward to in Xen is something called
lock-step execution -- a technique which allows you to have two or more
machines running the same instructions and have one immediately step in
for another if the other crashes or has an underlying hardware fault.
Along with that comes replayability, so that you can go back in time and
see what the machine was doing just before the failure. Sweet!

Cheers,
Simon P. Ditner

On Thu, 2 Mar 2006, Paul Nash wrote:
> > running x number of virtual Asterisk servers on one physical Linux
> > server to a SAN,
>
> I assume that you're thinking of Linux running on VMWare running on
Linux.
> VMWare have an enterprise product (not sure if it's hit the streets
yet)
> that is similar to IBM's mainframe VM supervisor.  Very lightweight,
> partitions the machine, loads onto bare metal.  Almost no overhead.
>
> If you want to do the same thing for free, look at Xen, which has a
similar
> approach.  The guest operating system has to understand Xen (which
makes
> for great performance), but both Linux and NetBSD have Xen ports.  You
may
> have to hack up some digium/sangoma drives for Xen to present virtual
cards
> to the VMs, but that shouldn't take very long.
>
> Solaris is a fine enterprise OS, but is *very* resource-hungry.
>
> 	paul
>
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