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Hyper-V Resource Control

November 30, 2010 Leave a comment Go to comments

Virtual Machine Reserve (percentage) – this value says how much CPU is kept aside for the running Virtual Machine.

Percent of total system resources – this is a precent of a Virtual Machine processor time, that is measured by how many processors are assigned to the virtual machine

Virtual Machine Limit (percentage) – this is a percent of CPU that the running Virtual Machine is not allowed to go over the top of

Percent of total system resources – this is percent of a VM processor time, that is measured by how many processors are assigned to the physical computer

Relative Weight – this is used to decide how CPU is distributed. (Basically a virtual machine with the higher weight (say 500) will get twice the CPU time as a virtual machine with a weight lower weight (say 400).

Example:

Basically on a 1 CPU and 4 Core computer you can run 40 1 CPU Virtual Machines if their reserve is 10%.

-Eric

Source: MS TechNet Forums.

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  1. Dennis Harders
    November 30, 2010 at 4:27 pm

    Hi Eric,

    Basicly you are right. But the virtual – physical CPU ratio limit is 8:1. Meaning with 4 cores the host can handle 32 VMs. Advised is to stick to 4:1 so this brings us to 16.

    Dennis

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