On 04/12/2018 05:24 AM, Richard W.M. Jones wrote:
> I don't think we have nbd-server in RHEL, and in any case wouldn't it
> be better to use qemu-nbd?
>
> You just start a new qemu-nbd process instead of faffing around with
> configuration files, kill the qemu-nbd process when you're done, and
>
On Thu, Apr 12, 2018 at 2:07 AM Nir Soffer wrote:
> On Tue, Apr 10, 2018 at 6:53 PM Richard W.M. Jones
> wrote:
>
...
> Dan Berrange pointed out earlier on that it might be easier if imageio
>>
> just exposed NBD, or if we found a way to tunnel NBD requests over web
>> sockets (in the format ca
On Thu, Apr 12, 2018 at 03:44:26PM +, Nir Soffer wrote:
> On Thu, Apr 12, 2018 at 5:42 PM Eric Blake wrote:
>
> > On 04/12/2018 05:24 AM, Richard W.M. Jones wrote:
> >
> > > I don't think we have nbd-server in RHEL, and in any case wouldn't it
> > > be better to use qemu-nbd?
> > >
> > > You
On Thu, Apr 12, 2018 at 5:42 PM Eric Blake wrote:
> On 04/12/2018 05:24 AM, Richard W.M. Jones wrote:
>
> > I don't think we have nbd-server in RHEL, and in any case wouldn't it
> > be better to use qemu-nbd?
> >
> > You just start a new qemu-nbd process instead of faffing around with
> > configu
On Thu, Apr 12, 2018 at 09:22:16AM +, Nir Soffer wrote:
> I think we can expose NBD using ndb-server and dynamic exports.
> It can work like this:
>
> 0. Install nbd and enable nbd-server on a host, running
>as vdsm:kvm, not exporting anything.
>
> 1. User starts transfer session via oVir
On Tue, Apr 10, 2018 at 6:53 PM Richard W.M. Jones
wrote:
> On Tue, Apr 10, 2018 at 03:25:47PM +, Nir Soffer wrote:
> > On Tue, Apr 10, 2018 at 5:50 PM Richard W.M. Jones
> > wrote:
> >
> > > On Tue, Apr 10, 2018 at 02:07:33PM +, Nir Soffer wrote:
> > > > This makes sense if the device i
On Tue, Apr 10, 2018 at 6:00 PM Eric Blake wrote:
> On 04/10/2018 09:40 AM, Richard W.M. Jones wrote:
> >> When the destination is a block device we cannot avoid zeroing since a
> block
> >> device may contain junk data (we usually get dirty empty images from our
> >> local
> >> xtremio server).
On Tue, Apr 10, 2018 at 03:25:47PM +, Nir Soffer wrote:
> On Tue, Apr 10, 2018 at 5:50 PM Richard W.M. Jones
> wrote:
>
> > On Tue, Apr 10, 2018 at 02:07:33PM +, Nir Soffer wrote:
> > > This makes sense if the device is backed by a block device on oVirt side,
> > > and the NBD support eff
On Tue, Apr 10, 2018 at 09:52:40AM -0500, Eric Blake wrote:
> Didn't Rich already try to do that?
>
> +def emulate_zero(h, count, offset):
> +# qemu-img convert starts by trying to zero/trim the whole device.
> +# Since we've just created a new disk it's safe to ignore these
> +# reque
On Tue, Apr 10, 2018 at 5:50 PM Richard W.M. Jones
wrote:
> On Tue, Apr 10, 2018 at 02:07:33PM +, Nir Soffer wrote:
> > This makes sense if the device is backed by a block device on oVirt side,
> > and the NBD support efficient zeroing. But in this case the device is
> backed
> > by an empty
On 04/10/2018 09:40 AM, Richard W.M. Jones wrote:
>> When the destination is a block device we cannot avoid zeroing since a block
>> device may contain junk data (we usually get dirty empty images from our
>> local
>> xtremio server).
>
> (Off topic for qemu-block but ...) We don't have enough in
On 04/10/2018 09:07 AM, Nir Soffer wrote:
> On Tue, Apr 10, 2018 at 4:48 PM Kevin Wolf wrote:
>
>> Am 10.04.2018 um 15:03 hat Nir Soffer geschrieben:
>>> On Tue, Apr 10, 2018 at 1:44 PM Richard W.M. Jones
>>> wrote:
>>>
We now have true zeroing support in oVirt imageio, thanks for that.
>>>
On Tue, Apr 10, 2018 at 02:07:33PM +, Nir Soffer wrote:
> This makes sense if the device is backed by a block device on oVirt side,
> and the NBD support efficient zeroing. But in this case the device is backed
> by an empty sparse file on NFS, and oVirt does not support yet efficient
> zeroing
On Tue, Apr 10, 2018 at 4:48 PM Kevin Wolf wrote:
> Am 10.04.2018 um 15:03 hat Nir Soffer geschrieben:
> > On Tue, Apr 10, 2018 at 1:44 PM Richard W.M. Jones
> > wrote:
> >
> > > We now have true zeroing support in oVirt imageio, thanks for that.
> > >
> > > However a problem is that ‘qemu-img c
On Tue, Apr 10, 2018 at 03:48:11PM +0200, Kevin Wolf wrote:
> Am 10.04.2018 um 15:03 hat Nir Soffer geschrieben:
> > On Tue, Apr 10, 2018 at 1:44 PM Richard W.M. Jones
> > wrote:
> >
> > > We now have true zeroing support in oVirt imageio, thanks for that.
> > >
> > > However a problem is that ‘q
Am 10.04.2018 um 15:03 hat Nir Soffer geschrieben:
> On Tue, Apr 10, 2018 at 1:44 PM Richard W.M. Jones
> wrote:
>
> > We now have true zeroing support in oVirt imageio, thanks for that.
> >
> > However a problem is that ‘qemu-img convert’ issues zero requests for
> > the whole disk before starti
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