Can someone tell me the status of qcow2 support existing today in Xen? What (code changes, tools etc) needs to be done to get it working today? I am trying to leverage it for use in VM snapshots. I was going through the Qcow Wiki<http://wiki.xensource.com/xenwiki/COWHowTo> and I see that it was last edited in 2007 so I am not sure how current all that info is. Thanks, Aravindh _______________________________________________ Xen-devel mailing list Xen-devel@lists.xensource.com http://lists.xensource.com/xen-devel
On Fri, May 07, 2010 at 11:26:59AM -0700, Aravindh Puthiyaparambil wrote:> Can someone tell me the status of qcow2 support existing today in Xen? > What (code changes, tools etc) needs to be done to get it working today? I > am trying to leverage it for use in VM snapshots. I was going through the > [1]Qcow Wiki and I see that it was last edited in 2007 so I am not sure > how current all that info is. >I think the focus has been on VHD support instead, which also has snapshots, and should work a lot better than qcow2, see: http://wiki.xensource.com/xenwiki/Xen4.0 http://wiki.xensource.com/xenwiki/blktap2 -- Pasi _______________________________________________ Xen-devel mailing list Xen-devel@lists.xensource.com http://lists.xensource.com/xen-devel
Hello, Am Freitag 07 Mai 2010 20:34:58 schrieb Pasi Kärkkäinen:> On Fri, May 07, 2010 at 11:26:59AM -0700, Aravindh Puthiyaparambil wrote: > > Can someone tell me the status of qcow2 support existing today in Xen? > > What (code changes, tools etc) needs to be done to get it working > > today? I am trying to leverage it for use in VM snapshots. I was going > > through the [1]Qcow Wiki and I see that it was last edited in 2007 so I > > am not sure how current all that info is. > > I think the focus has been on VHD support instead, which also has > snapshots, and should work a lot better than qcow2, see: > > http://wiki.xensource.com/xenwiki/Xen4.0 > http://wiki.xensource.com/xenwiki/blktap2Any news on Qcow2 support for Xen4? Is someone working on it? Sincerely Philipp Hahn -- Philipp Hahn Open Source Software Engineer hahn@univention.de 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 _______________________________________________ Xen-devel mailing list Xen-devel@lists.xensource.com http://lists.xensource.com/xen-devel
On Mon, Nov 08, 2010 at 10:31:03AM +0100, Philipp Hahn wrote:> Hello, > > Am Freitag 07 Mai 2010 20:34:58 schrieb Pasi Kärkkäinen: > > On Fri, May 07, 2010 at 11:26:59AM -0700, Aravindh Puthiyaparambil wrote: > > > Can someone tell me the status of qcow2 support existing today in Xen? > > > What (code changes, tools etc) needs to be done to get it working > > > today? I am trying to leverage it for use in VM snapshots. I was going > > > through the [1]Qcow Wiki and I see that it was last edited in 2007 so I > > > am not sure how current all that info is. > > > > I think the focus has been on VHD support instead, which also has > > snapshots, and should work a lot better than qcow2, see: > > > > http://wiki.xensource.com/xenwiki/Xen4.0 > > http://wiki.xensource.com/xenwiki/blktap2 > > Any news on Qcow2 support for Xen4? > Is someone working on it? >Hello, Did you actually read the blktap2 wiki page? It should work with Xen 4.0. -- Pasi _______________________________________________ Xen-devel mailing list Xen-devel@lists.xensource.com http://lists.xensource.com/xen-devel
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@univention.de 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 _______________________________________________ Xen-devel mailing list Xen-devel@lists.xensource.com http://lists.xensource.com/xen-devel