With the new version of Hyper-V, most limits of older versions has either been increased noticeably or been removed and became dependent on the hardware limits being used, like Live Migration, VP:LP ratio etc.
The comparison between the Hyper-V versions can be seen in the following table:
| Feature | Windows Server 2008 |
Windows Server 2008 R2 |
Windows Server 2012 |
| HW Logical Processor Support | 16 LPs | 64 LPs | 320 LPs |
| Physical Memory Support | 1 TB | 1 TB | 4 TB |
| Cluster Scale | 16 Nodes up to 1000 VMs | 16 Nodes up to 1000 VMs | 64 Nodes up to 4000 VMs |
| Virtual Machine Processor Support | Up to 4 VPs | Up to 4 VPs | Up to 64 VPs |
| VM Memory | Up to 64 GB | Up to 64 GB | Up to 1 TB |
| Live Migration | Yes, one at a time | Yes, one at a time | Yes, with no limits. As many as hardware will allow. |
| Live Storage Migration | No. Quick Storage Migration via SCVMM | No. Quick Storage Migration via SCVMM | Yes, with no limits. As many as hardware will allow. |
| Servers in a Cluster | 16 | 16 | 64 |
| VP:LP Ratio | 8:01 | 8:1 for Server / 12:1 for Client (VDI) | No limits. As many as hardware will allow. |
|
Live Storage Migration
|
No. Quick Storage Migration via SCVMM | No. Quick Storage Migration via SCVMM | Yes, with no limits. As many as hardware will allow. |
| VMs on File Storage | No | No | Yes, SMB 3.0 |
| Guest Fiber Channel | No | No | Yes |
| Virtual Disk Format | VHD up to 2 TB | VHD up to 2 TB | VHD up to 2 TB / VHDX up to 64 TB |
| VM Guest Clustering | Yes, via iSCSI | Yes, via iSCSI | Yes, via iSCSI or FC |
| Native 4k Disk Support | No | No | Yes |
| Live VHD Merge | No, offline. | No, offline. | Yes |
| Live New Parent | No | No | Yes |
| Secure Offloaded Data Transfer (ODX) | No | No | Yes |
Bulent Tolu
Sr. Systems Engineer at VMware
Bulent is an IT professional with Master's in MIS and 10-years of experience in broad range of Information Technologies. He is exposed to engineering/architecting, implementation/integration, and administration of various high-available IT systems and infrastructure. He has a passion to continually research, test and evaluate new technologies and follow industry best practices to secure and optimize IT systems. Currently, he lives in Istanbul and works as a Sr. Systems Engineer at VMware.
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