Hyper-V And Virtual Computer Expression From 2008 To 2008

From the transition from 2008 to 2012 there were many changes in respect to Hyper-V. There are distinct services which were not available in 2008 which now make it much more robust than the previous years. In 2012 Hyper-V allows for shared virtual hard disk. In doing this it is now possible to share virtual HD files (.vhdx) between multiple virtual machines. This in turn makes it possible to deploy a guest failover cluster which is no longer bound to storage topology. The shared virtual HD is an ideal use for SQL Server database files, file server services running within a Virtual Machine, or Database files which reside on shared disks. The quality of service within Hyper-V was also increased with 2012. Unlike previously, Hyper-V†¦show more content†¦These resources include display config, audio, printers, clipboard, smart cards, drivers, USB devices, and supported plug and play devices. One final addition is the implementation of automatic virtual machine activation . It is now possible to implement installs of VM on a computer where Windows Server 2012 R2 is properly activated without having to manage product keys for each individual VM. This is even in disconnected environments. The VM can be activated in remote locations and with or without an internet connection. It is possible to track VM usage and licenses from the virtualization server without requiring any access right to the virtual machines. There are some major differences between 2008 and 2012 versions of Hyper-V regarding support of memory, storage, network, and its overall manageability. In Windows Server 2008 physical memory was limited to 1TB. There were only 512 virtual processors per host and 4 per virtual machine. Memory per VM was limited to 64GB. There could only be 384 active Virtual Machines with cluster nodes of 16. Looking at the progression to 2012, the physical memory caps at 4TB. There are now 2,048 virtual processors per host and 64 per virtual machine. 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