Fast Virtual Disk

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Fast Virtual Disk (better known as FVD) is a virtualization-oriented disk image file format developed by IBM for the QEMU virtualization platform. It differs from existing paravirtualization-centric virtual disk image formats through a design that emphasizes lack of contention and separation of concerns between the host and guest kernels through duduplication of filesystem and block layer storage management.

Architecture[edit]

FVD can be written either directly to a physical or logical blockstore (avoiding host filesystem overheads), or to a regular host file system file. It strives to maintain similarity to raw disk layouts, eliminate host filesystem and disk image compression overheads, and minimize metadata-related overheads.[1]

See also[edit]

External links[edit]

References[edit]

  1. ^ "Fast Virtual Disk (FVD) for QEMU". IBM T.J. Watson Research Center. January 2011. Retrieved 28 September 2013. "In summary, the design of FVD takes a principled approach to achieve the following benefits: Strive to make the on-disk data layout identical (or at least as close as possible) to that of a RAW image stored on a raw partition. Eliminate the overhead of a host file system when it can be avoided. Eliminate the overhead of a compact image when it can be avoided. Minimize disk I/O overhead for reading on-disk metadata by reducing metadata size. Minimize disk I/O overhead for updating on-disk metadata."