Re: [Qemu-devel] [PATCH V4 3/4] Add backing drive while performing backup.

2013-07-19 Thread Paolo Bonzini
Il 19/07/2013 03:13, Fam Zheng ha scritto: >>> > > Also set target->backing_file and target->backing_format here? Paolo? >> > >> > I don't think so, it is temporary while the job runs so that the NBD >> > server can already return the actual data. > OK. > > For NBD export, it's also going to have

Re: [Qemu-devel] [PATCH V4 3/4] Add backing drive while performing backup.

2013-07-18 Thread Fam Zheng
On Thu, 07/18 15:13, Paolo Bonzini wrote: > Il 18/07/2013 08:39, Fam Zheng ha scritto: > > On Wed, 07/17 13:04, Ian Main wrote: > >> This patch adds the original source drive as a backing drive to our target > >> image so that the target image will appear complete during backup. This > >> is espec

Re: [Qemu-devel] [PATCH V4 3/4] Add backing drive while performing backup.

2013-07-18 Thread Paolo Bonzini
Il 18/07/2013 08:39, Fam Zheng ha scritto: > On Wed, 07/17 13:04, Ian Main wrote: >> This patch adds the original source drive as a backing drive to our target >> image so that the target image will appear complete during backup. This >> is especially useful for SYNC_MODE_NONE as it allows export

Re: [Qemu-devel] [PATCH V4 3/4] Add backing drive while performing backup.

2013-07-17 Thread Fam Zheng
On Wed, 07/17 13:04, Ian Main wrote: > This patch adds the original source drive as a backing drive to our target > image so that the target image will appear complete during backup. This > is especially useful for SYNC_MODE_NONE as it allows export via NBD to > have a complete point-in-time snaps

[Qemu-devel] [PATCH V4 3/4] Add backing drive while performing backup.

2013-07-17 Thread Ian Main
This patch adds the original source drive as a backing drive to our target image so that the target image will appear complete during backup. This is especially useful for SYNC_MODE_NONE as it allows export via NBD to have a complete point-in-time snapshot available for export. Signed-off-by: Ian