Virtuozzo Parallels, that works on this basis, although reasonably successful, is never really mentioned in the same breath as Citrix, VMWare and Microsoft.
We think the industry has agreed that there are two levels of vendor when it comes to virtualisation, the afore-mentioned three as enterprise-class vendors, and Parallels/Virtual Iron and the rest on a secondary level.
One of the big problems with container-based virtualisation, is that you have to have the same operating system on every virtual machine.
With the other methods of virtualisation, you can have Linux running next door to Windows Server 2003 running next door to Windows Server 2000 if you so wish.
Secondly, Microsoft going down the path of paravirtualisation undeniably confirmed that this was the best, fastest and most effective way to virtualise a server.
They were late to the game and so had the time to way up the options before choosing the correct one.
After doing so, they rejected VMware’s emulation model and chose the paravirtualisation method being used by Xen, XenSource, and now Citrix XenServer.
Thanks to this, there is a very close tie between XenServer and Hyper-V that will further alienate the 2nd-tier vendors and threaten VMware’s dominance of the market quite considerably.
The news from VMware yesterday about the sacking of their CEO and missing growth targets is just the beginning.