Server virtualization, also known as hardware virtualization, is a hot topic in the IT world because of the potential for serious economic benefits. Server virtualization enables multiple operating systems to run on a single physical machine as virtual machines (VMs). With server virtualization, you can consolidate workloads across multiple underutilized server machines onto a smaller number of machines. Fewer physical machines can lead to reduced costs through lower hardware, energy, and management overhead, plus the creation of a more dynamic IT infrastructure.
Hyper-V, the next-generation hypervisor-based server virtualization technology, as a role, plus flexible licensing policies, it's now easier than ever to take advantage of the cost savings of virtualization through Windows Server 2008. This enables you to make the best use of your server hardware investments by consolidating multiple server roles as separate virtual machines (VMs) running on a single physical machine and also efficiently run multiple different operating systems—Windows, Linux, and others—in parallel, on a single server, and fully leverage the power of x64 computing.
The hypervisor is a layer of software that runs above the physical hardware and below one or more operating systems. The hypervisor's main purpose is to provide isolated execution environments called partitions. The hypervisor provides each partition with the partition's own set of hardware resources (for example, memory, devices, and CPU cycles). The hypervisor must control and arbitrate access to the underlying hardware.
The Windows hypervisor, part of Hyper-V, performs the following tasks:
Hyper-V, the next-generation hypervisor-based server virtualization technology, as a role, plus flexible licensing policies, it's now easier than ever to take advantage of the cost savings of virtualization through Windows Server 2008. This enables you to make the best use of your server hardware investments by consolidating multiple server roles as separate virtual machines (VMs) running on a single physical machine and also efficiently run multiple different operating systems—Windows, Linux, and others—in parallel, on a single server, and fully leverage the power of x64 computing.
The hypervisor is a layer of software that runs above the physical hardware and below one or more operating systems. The hypervisor's main purpose is to provide isolated execution environments called partitions. The hypervisor provides each partition with the partition's own set of hardware resources (for example, memory, devices, and CPU cycles). The hypervisor must control and arbitrate access to the underlying hardware.
The Windows hypervisor, part of Hyper-V, performs the following tasks:
- Creates logical partitions.
- Manages memory and processor scheduling for guest OSs.
- Provides mechanisms in order to virtualizes input/output and communicate among partitions.
- Enforces memory access rules.
- Enforces policy for CPU usage.
- Exposes a simple programmatic interface known as hypercalls.
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