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xen-devel
Re: [Xen-devel] Qcow2 support
Hello,
On Monday November 08 2010 10:54:11 Pasi Kärkkäinen wrote:
> On Mon, Nov 08, 2010 at 10:31:03AM +0100, Philipp Hahn wrote:
thank you for your fast answer,
> > > http://wiki.xensource.com/xenwiki/blktap2
> >
> > Any news on Qcow2 support for Xen4?
> > Is someone working on it?
>
> Did you actually read the blktap2 wiki page?
Yes, I tried to parse it but maybe I misunderstood something:
For xen-4.0.0 it's taking about "tap:qcow2:/path",
For xen-4.0.1 it's suddenly taking about "tap2:tapdisk:XXX:/path"
Also from reading xen-4.0.1/tools/blktap2/drivers/block-qcow.c:927
> case 2:
> //TODO: Port qcow2 to new blktap framework.
> // close(fd);
> // dd->drv = &tapdisk_qcow2;
> // return dd->drv->td_open(dd, name, flags);
> goto fail;
So maybe I'm just confused about blktap[12] and the sudden naming change with
tap/tap2.
> It should work with Xen 4.0.
Maybe I asked my question wrong: Is qcow2 working with xen4-aio or what is
currently best practice using qcow2?
To give some context: Mainly I'm interesed in finding a suitable image format,
which supports base-images for copy-on-write (and probably snap-shots).
Sicnerely
Philipp Hahn
--
Philipp Hahn Open Source Software Engineer hahn@xxxxxxxxxxxxx
Univention GmbH Linux for Your Business fon: +49 421 22 232- 0
Mary-Somerville-Str.1 28359 Bremen fax: +49 421 22 232-99
http://www.univention.de
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