When determining the capacity available for guests, reserve one CPU core, 1 GB of RAM, 1 NIC, and a RAID 1 partition for the host server itself sized at 20 GB + the amount of RAM in the server. For example, if the server has 32 GB of RAM, the RAID 1 OS partition would be sized to a minimum of 52 GB to ensure that the proper amount of space required for memory dumps in the case of host OS failures. The remainder of the host server capacity can be utilized for guest virtual machines.
Define Guest Hardware Profiles
System Center Virtual Machine Manager provides the concept of Hardware Profiles, which are user defined collections of virtual machine guest hardware settings such as the number of logical processors, the amount of RAM, and so on. When creating a new virtual machine, the hardware profile can be selected to ensure that a consistent set of configuration settings are applied for all guest virtual machines that use the profile.
For simplicity and consistency of consolidation planning, three guest hardware profiles are recommended and detailed below.