Re: [Qemu-devel] QCow v2

[Julian Seward <jseward@acm.org>]

I have used VMware on a Windows host with the vmdk files on a compressed
NTFS partition.  The result of compression was eventually to cause the
vmdk files to become extremely fragmented (tens of thousands of fragments)
which seriously reduces performance in the end.  I'm not sure why this
happens.  So it would be good not to fall into that particular hole.

J


On Tuesday 04 July 2006 11:57, Fabrice Bellard wrote:
> If it does not compress significantly better I see no need for that
> (remember that qemu uses 4 KB clusters).
>
> Fabrice.
>
> Christian MICHON wrote:
> > how about also adding lzma compression for qcow ?
> > I know how to do this inside linux kernel, but lzma'ed qcow images
> > for windows guests could be a very nice addition too.
> >
> > Thank Mark for the notes. I'll look at it to see how to start a
> > lzma patch for qcow...
> >
> > On 7/4/06, Fabrice Bellard <fabrice@bellard.org> wrote:
> >> Regarding my current plans, the next qcow evolution will be the support
> >> for multiple snapshots. Each snapshot will be tagged by a label.
> >>
> >> Fabrice.
>
> _______________________________________________
> Qemu-devel mailing list
> Qemu-devel@nongnu.org
> http://lists.nongnu.org/mailman/listinfo/qemu-devel