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Microsoft Hyper-V Cluster Design by Eric Siron

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How Hyper-V Server uses memory

In strict terms of its hypervisor functionality, Hyper-V Server uses very little memory. However, it is inextricably linked to the management operating system, which requires memory just like any other operating system.

Host memory

Memory for the hypervisor and the management operating system is not directly assigned by an administrator (although a reserve can be set). Virtual machines will be allocated memory according to their demands and the hypervisor, and management operating system will have access to whatever is left. It is not possible to entirely squeeze either of these functions out through virtual machine overload; Hyper-V will refuse to start any virtual machine that would cause complete memory starvation. ...

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