Multiple VMs can be combined in VM groups.
CPU utilization is then controlled by VM2000 in two stages. This strategy enables logically associated guest systems to be examined as a unit with regard to CPU utilization. For example, multiple VMs can be provided for a customer and be assigned a service level.
The following VM group parameters enable the VM2000 administrator to influence the distribution of the CPU performance:
A VM group is prioritized vis-à-vis other VM groups or (individual) VMs in the same way as (individual) VMs, i.e. via the CPU-QUOTA and MAX-CPU-UTILIZATION parameters of the VM group.
The MEMBER-CPU-QUOTA controls prioritization among the VMs which form the VM group. For the scheduling priority the MEMBER-CPU-QUOTA is qualified by the CPU-QUOTA of the VM group.
In addition to the CPU utilization of the VM group the CPU utilization of each VM in a VM group can be limited using MAX-CPU-UTILIZATION.
With VM groups VM2000 primarily attempts to distribute the unused share of the CPU performance of a VM to the other members of the VM group.
VM groups do not generate any additional VM2000 overhead.