Re: [Xen-devel] pvops upstream status - VHD

[Philipp Hahn <hahn@xxxxxxxxxxxxx>]

Hello,

On 17.06.2014 16:28, Fabio Fantoni wrote:
> My test was only with raw image, for what I read time ago probably the
> only problem should be with vhd format they said needed improvements on
> qemu but they might have done in the meantime (if I remember good I read
> it 2 year ago).

VHD in QEMU had very little changes, differencing images are still not
supported (I have a WIP patch which supports reading, but write seems to
be broken). What's also missing it support for the journaling extension,
which vhd-utils supports.
VHDX support seems to be a lot better in QEMU (and non-existent in
chd-utils), which AFAIK has removed some limitations of VHD (image size,
journaling support), so my personal opinion would classify VHD as
legacy, for which read support is good to have, but write support is
less important.

Philipp

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