Microsoft_Press_ebook_Introducing_Windows_Server_2012_R2_PDF.pdf

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export the virtual machine first. Dynamic Memory improvements Dynamic Memory was improved in Hyper-V in Windows Server 2012 to include support for configuring minimum memory. In addition, Smart Paging, a new memory management mechanism, was introduced to provide a reliable restart experience for virtual machines configured with less minimum memory than startup memory. Single-root I/O virtualization (SR-IOV) Hyper-V in Windows Server 2012 allowed you to assign network adapters that supported SR-IOV directly to virtual machines running on the host. SR-IOV maximized network throughput while minimizing network latency and CPU overhead needed for processing network traffic.
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Generation 2 virtual machines CHAPTER 2 7 Virtual Fibre Channel Hyper-V in Windows Server 2012 allowed you to connect directly to Fibre Channel storage from within the guest operating system that runs in a virtual machine. This allowed you to virtualize workloads and applications that require direct access to Fibre Channel–based storage. It also made guest clustering (clustering directly within the guest operating system) possible when using Fibre Channel–based storage. Hyper-V Replica Hyper-V in Windows Server 2012 allowed you to replicate virtual machines between storage systems, clusters, and data centers in two sites to provide business continuity and disaster recovery. Now that we’ve reviewed the Hyper-V improvements introduced previously in Windows Server 2012, let’s move on and examine some of the new capabilities added to Hyper-V in Windows Server 2012 R2. Generation 2 virtual machines One of the key ways that Windows Server 2012 R2 advances the Hyper-V virtualization platform is in its support for a new generation of virtual machines. Microsoft refers to these as “Generation 2” virtual machines, and they have the key following characteristics: UEFI-based Beginning with Windows 8 and Windows Server 2012, Microsoft Windows now supports the Secure Boot feature of the Unified Extensible Firmware Interface (UEFI). This means that UEFI is now part of the Windows 8 and Windows Server 2012 boot architecture, and it replaces the Basic Input/Output System (BIOS) firmware interface used by previous versions of Windows for initiating the boot process. Generation 2 virtual machines comply with the UEFI Secure Boot standard and enable virtual machines to use Secure Boot. Legacy free In previous versions of Hyper-V, virtual machines used a standard set of emulated hardware devices to ensure compatibility running all versions of Windows. These emulated devices include an AMI BIOS, Intel 440BX chipset motherboard, S3 Trio graphics display adapter, Intel/DEC 21140 network adapter, and so on. With Generation 2 virtual machines, many of these emulated devices have now been removed and replaced with synthetic drivers and software-based devices as summarized in Table 2-1.
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