Dynamic Optimization and Power Optimization for a host group in System Center 2012 – Virtual Machine Manager (VMM)
With Dynamic Optimization you can configure threshold values that allows the cluster to balance the load of it’s resources automatically without having to implement SCOM. And – it supports not only Hyper-V clusters but also VMware and Citrix XenServer clusters.
Dynamic Optimization can be configured in two modes:
– Manual (which is the default)
The automatic mode will by default try to balance the cluster every 10 minutes: You also have the choice of three Aggressiveness modes:
– High (this results in more VM migrations to balance the cluster)
– Low (this results in less VM migrations because VMM is not that strict on the balance)
Aggressiveness determines the amount of imbalance in virtual machine load on the hosts that is required in order to initiate a migration during Dynamic Optimization. When you configure frequency and aggressiveness for Dynamic Optimization, you should try to balance the resource cost of additional migrations against the advantages of balancing load among hosts in a host cluster. Initially, you might accept the default value of Medium. After you observe the effects of Dynamic Optimization in your environment, you can increase the aggressiveness.
Host Reserve threshold:
Power Optimization threshold:
Power Optimization is an optional feature of Dynamic Optimization, and it is only available when a host group is configured to migrate virtual machines through Dynamic Optimization. Through Power Optimization, VMM helps to save energy by turning off hosts that are not needed to meet resource requirements within a host cluster and turns the hosts back on when they are needed again.