In this post series I started here http://blogs.technet.com/b/meamcs/archive/2012/07/10/windows-server-2012-part1-release-date.aspx with a release date announced in Windows Server Blog and highlighted the main areas of enhancements that I will focus on in this series starting from Virtualization Enhancements that will take more than one post to cover it, so let me start directly with Windows Server 2012 Virtualization Scalability Enhancements, table below shows how scalability improved in Windows Server 2012:
Note that these numbers have changed with every public preview of Windows Server so they may change again for RTM.
As you can see above that is a very major change in virtualization scalability compared to Windows 2008 R2 that put Microsoft Virtualization on top of all virtualization platform in the market, one of the main scalability point is number of virtual CPUs per Virtual Machine than can be up to 64 CPUs per Virtual Machine in Windows Server 2012.
Then if we move to Windows Server 2012 Virtualization Flexibility Enhancements I will start with different choices to select where virtual machine can be hosted on one of the following options:
To describe more how to host Virtual Machine on Windows Server 2010 file server, simply all you will need is to create a shared folder on Windows Server 2012 file server cluster and give the Hyper-V Server computer name a full control on the shared folder, then while creating a new virtual machine select to host the virtual machine and its virtual hard disk on the file server shared folder, in the below example file server SMB based virtual machine is hosted on high available file server cluster then we can transfer the cluster file share containing virtual machines to another cluster node and this should not affect the running virtual machine which mean virtual machine should not experience any downtime or services interruption, for more details about how to simulate this scenario follow the below steps:
Note: Hosting Virtual Machine on Cluster File Server is not mean that virtual machine itself is become highly available, and you still need to have Hyper-V cluster to provide high availability for virtual machines.
In the coming post I will continue in Windows Server 2012 Virtualization enhancement and will cover a very good feature which is Hyper-V Replication which is considered a new virtualization feature and high availability feature in Windows Server 2012 on level of virtualization, So be tuned.