From my previous experience, I can't say, it's a correct.
I'm using asterisk (over 3 years) and kamailio (about 1 year) in a *production* environment using Xen and I have almost no problems with timers (they were previously with 100Hz), but I have experienced A LOT of problems with asterisk or any voip-related projects using OpenVZ. So from my own perspective, OpenVZ (which is a more cheaper) is only suitable for hosting (web or such of tasks) or any non-realtime tasks. Maybe it was caused by incorrect settings on host (which was out of my control). Maybe I'm wrong but to me, Xen is better vs OpenVZ :-)
2012/8/28 Olle E. Johansson oej@edvina.net
I haven't heard anyone using Asterisk in large production systems in other virtualization than OpenVZ. Asterisk depends a lot on timers and these aren't reliable enough in Vmware and Xen when putting load on the media server.
I would love to hear about a successful implementation :-) on other platforms but so far I haven't. While waiting, OpenVZ works great.
/O
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