Re: [Qemu-devel] Is qemu-img amend an atomic operation?

[Maor Lipchuk]

On Mon, Dec 19, 2016 at 3:10 PM, Kevin Wolf <address@hidden> wrote:

> Am 19.12.2016 um 13:49 hat Maor Lipchuk geschrieben:
> >
> > On Mon, Dec 19, 2016 at 2:47 PM, Maor Lipchuk <address@hidden>
> wrote:
> >
> >     Hi All,
> >
> >     Does amend considered as an atomic operation or should we mark a
> volume as
> >     ILLEGAL once the amend operation fails?
> >
> >     also, if I call amend, but downgrade the QCOW volume compatibility
> level
> >     from 1.1 to 0.10, is that atomic as well (or not, based on the
> answer on
> >     the previous question)?
> >
> >     Regards,
> >     Maor
> >
> > Adding also Nir and Kevin to the thread.
>
> Like with every other operation, the image is supposed to stay
> consistent at all times, even if the host crashes in the middle.
> Leaked clusters are the worst that should be possible, anything
> else would be a bug.
>
> Kevin
>


Great, thank you!