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Re: [Xen-devel] [RFC V10 0/4] domain snapshot document

On Fri, Jan 30, 2015 at 03:01:11PM +0100, Fabio Fantoni wrote:
> Il 30/01/2015 14:38, Wei Liu ha scritto:
> >On Thu, Jan 29, 2015 at 04:36:43PM +0000, Ian Campbell wrote:
> >>On Mon, 2015-01-26 at 11:25 +0800, Chunyan Liu wrote:
> >>>Changes to V9:
> >>This looks good to me, thanks.
> >>
> >>Ian/Wei do you have any comments? xapi folks?
> >>
> >Looks good to me.
> >
> >Wei.
> I looked to the project of domain snapshot and seems good.
> I have only a question.
> I saw this:
> >Disk snapshot can be created by many external tools, like qemu-img,
> >vhd-util and lvm, etc.
> Wouldn't it be good to also use btrfs for external disks snapshot?
> Even if btrfs snapshots works on subvolumes (directories) it is possible to
> atomically creates a copy-on-write snapshot of a file (with domUs disks on
> file, including raw) with btrfs clone operation (reflink systemcall, eg: cp
> --reflink source dest)

I think that "etc." potentially covers all other external tools,
including btrfs. You can list all possible external tools in the world.


> >
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> >Xen-devel@xxxxxxxxxxxxx
> >http://lists.xen.org/xen-devel

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