Qlogic 2600 Series Hyper-V Virtual Server Engine Manuel d'utilisateur télécharger pdf (Page 9)

The size of a dynamically expanding VHD is as large as the data that is wrien to it. As more data is wrien to a dynamically

expanding VHD, the le increases to a maximum size. A dierencing VHD is similar to a dynamically expanding VHD, but it contains

only the modied disk blocks of the associated parent VHD. Dynamically expanding VHDs are useful for tesng environments

because there is less impact if you have to rebuild the VHD. For example, some of the tests performed for this report used mulple

dynamically expanding VHDs, each with a dierent Windows image. Fixed VHDs are recommended for producon.

New Hyper-V Performance

VHDX

A new Hyper-V VHD format introduced with Windows Server 2012 that

increases storage capacity from 2TB to 64TB.

25 Percent More Throughput with Windows Server 2012 Hyper-V

One of the most important features in Microso Windows 2012 Hyper-V for I/O performance is the VHDX

virtual hard disk format, which provides storage for the guest OS. Tesng by Microso shows that VHDX

delivers nearly 25 percent beer write throughput than virtual hard disk (VHD) for both dynamically

expanding and dierencing disks.

VHDX Performance—1MB Sequenal Writes

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Qlogic 2600 Series Hyper-V Virtual Server Engine Manuel d'utilisateur Page 9