[on-asterisk] OT: Xen & VMware
David Cook
and full/paravirtualization before. I picked up a small test machine to
evaluate some new stuff and this was on my list.
I had some surprising findings and I'm not sure if they were normal or I
have missed the boat on something.
Do people find Xen typically perform poorer on full virtualization than
VMware 2 (my findings)? Or am I just noob enough to have missed something on
the learning curve?
Does Xen's performance on paraviruatlized linux clients outstrip it's
deficiencies in full virtualization or is the main drawing card that it can
access PCI devices within a VM?
Objective opinions really welcomed!
- dbc.
Liviu Toma
excited about Xen and the PCI pass through feature (I was planning to
use a Sangoma T1/PRI card). So, in my ignorance, I put together a
Citrix XenServer and installed asterisk 1.6.2.6 on a virtual machine.
To my disappointment, I learned that XenServer doesn't support PCI
pass through. Also, the asterisk is performing poorly, especially the
conference bridge that I am running on it (not a heavily used bridge,
something like 5-10 connections once or twice a day). For the PSTN
connectivity I was using a Cisco 2811 router instead of the Sangoma
card.
I will eventually migrate back to a physical machine, this setup was
only temporary while I rebuild the OS on it and reinstall the Sangoma
driver.
Liviu
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Duane at e164 dot org
> When I saw the thread about virtualization a few weeks, I got really
> excited about Xen and the PCI pass through feature (I was planning to
> use a Sangoma T1/PRI card). So, in my ignorance, I put together a
> Citrix XenServer and installed asterisk 1.6.2.6 on a virtual machine.
> To my disappointment, I learned that XenServer doesn't support PCI
> pass through. Also, the asterisk is performing poorly, especially the
> conference bridge that I am running on it (not a heavily used bridge,
> something like 5-10 connections once or twice a day). For the PSTN
> connectivity I was using a Cisco 2811 router instead of the Sangoma
> card.
For the conference to work you need to install a modified real time
kernel driver for asterisk to convert 8192 hz to 8000 hz...
I've never used XenServer but I have used Xen to build a firewall etc
and it worked very well, and I run a lot of asterisk systems on Xen and
haven't had any problems.
--
Best regards,
Duane
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