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How to Set Host Reserves for a Host

Updated: August 14, 2009

Applies To: Virtual Machine Manager 2008, Virtual Machine Manager 2008 R2, Virtual Machine Manager 2008 R2 SP1

Use the following procedure to set host reserves for an individual virtual machine host in System Center Virtual Machine Manager (VMM) 2008 or Virtual Machine Manager 2008 R2. Host reserves specify the amount of resources that VMM sets aside for the host operating system to use. For a virtual machine to be placed on a host, the host must be able to meet the virtual machine’s resource requirements without using host reserves. Host reserves can be set for individual host groups and for individual hosts. The host reserve settings for the root host group, All Hosts, set default host reserves for all hosts.

noteNote
In VMM 2008 R2, host reserves determine the CPU and memory thresholds for host-level actions in Performance and Resource Optimization (PRO). For more information, see About PRO (http://go.microsoft.com/fwlink/?LinkId=157194).

To set host reserves for a host

  1. In Hosts view, navigate to the host group that contains the host, and then, in the results pane, double-click the host.

  2. On the Reserves tab, specify the amount of the following resources to reserve for the host operating system to use:

    • Percentage of CPU

    • Amount of memory

    • Amount of disk space

    • Maximum disk I/O per second

    • Percentage of network capacity

  3. To save the settings, click OK.

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