(No major change in WS2019)Hyper-V in Windows Server 2012 significantly improves the scale of cluster sizes. It now supports running up to 8,000 virtual machines on a 64-node failover cluster (2008 R2 supported a maximum of 16 cluster nodes and 1,000 virtual machines per cluster).In Windows 2012 Server Core you can configure clustering with the SCONFIG cmd utility.In Server 2012 when using the iSCSI Software Target only up to 5 cluster hosts were supported on GA of the product.  http://technet.microsoft.com/en-us/library/gg509003(v=ws.10).aspx