According to this page, a Technology Preview is a feature that is currently unsupported, may not have complete functionality, and are not suitable for deployment in production. However, Red Hat provides these features and makes them available to the customer as a courtesy with the primary goal of exposing the feature to a wider audience.
I am quite often asked by my clients, which features are in tech preview for each release. Instead of spending time looking these things up each time I figured I would document them here.
This post is pretty much a bunch of links that I have found that I am using to get up to speed with ZenServer. I've got a new virtualization project just around the corner and Vmware is no longer a good fit for us.
The link below is from Citrix.com and compares the various features in the different versions of XenServer.
And the link below explains XenServer licensing. There are three licensed versions of XenServer, and of course a free version. The specific version that I am looking at is Enterprise, which only lacks a few features available in Platinum. Street price for Enterprise is $2500 per server.