In the next release of Windows Server Microsoft has nailed one of the most difficult problems in virtualisation: moving a running VM across a WAN.
Microsoft announced this at the Microsoft Build conference. It will be available in Microsoft's Hyper-V 3.0 included in Windows Server. This capability has certainly proved Microsofts maturity in virtualisation.
With live migration, a running VM is moved across computers without any disruption to the guest VM. Most hypervisors have the capability to do live migration across the same LAN segment and it is a given feature now.
A more taxing problem is the ability to move a live VM across different subnets, or separate WAN sub-networks. Network latencies and addressing complexities have made this task of many complexities.
At a basic level each virtual machine gets two IP addresses. One address is the home address for the VM itself, which it uses to communicate with the rest of the network. The second IP address will be available for the local data centre.
VMware also offers similar functionality but requires CIsco and its OTV (Overlay Transport Virtualization) technology.
This capability really starts to help with Hybrid clouds and how we can enter into the public cloud and importantly exit the cloud. This provides far more control over your operating environment.
Other new features in Hyper-V announced so far are:
Live migration of the VM's virtual hard disk
Scalability to support up to 32 virtual processors for each VM
Each VM can now have 512GB RAM
VHDX file system to create virtual storage disks up to 16TB in size.
And we are sure that there are plenty of other features that haven't even been announced yet. Good work Microsoft.
- Posted using BlogPress from my iPad
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