Il 05/03/2012 18:44, Marcelo Tosatti ha scritto:
> OK, can't it be fixed by image streaming on top of a blkmirror device?
> This would avoid a duplicate interface (such as no need to snapshot_blkdev
> to change to final copy).
>
> That is, start image streaming to a blkmirror device so that updat
On Mon, Mar 05, 2012 at 10:20:36AM -0700, Eric Blake wrote:
> On 03/05/2012 09:59 AM, Marcelo Tosatti wrote:
> > On Wed, Feb 22, 2012 at 05:13:32PM +, Federico Simoncelli wrote:
> >> Hi,
> >> recently I've been working on live block migration combining the live
> >> snapshots and the blkmirror
On 03/05/2012 09:59 AM, Marcelo Tosatti wrote:
> On Wed, Feb 22, 2012 at 05:13:32PM +, Federico Simoncelli wrote:
>> Hi,
>> recently I've been working on live block migration combining the live
>> snapshots and the blkmirror patch sent by Marcelo Tosatti few months ago.
>>
>> The design is sum
On Wed, Feb 22, 2012 at 05:13:32PM +, Federico Simoncelli wrote:
> Hi,
> recently I've been working on live block migration combining the live
> snapshots and the blkmirror patch sent by Marcelo Tosatti few months ago.
>
> The design is summarized at this url as "Mirrored-Snapshot":
>
> htt
- Original Message -
> From: "Paolo Bonzini"
> To: qemu-devel@nongnu.org
> Sent: Tuesday, February 28, 2012 7:02:40 PM
> Subject: Re: [Qemu-devel] Live Block Migration using Mirroring
>
> Il 28/02/2012 18:46, Federico Simoncelli ha scritto:
> > > >
Il 28/02/2012 18:46, Federico Simoncelli ha scritto:
> > > Thank you for getting this. Being able to have a bogus backing file
> > > was a bonus but it's not really required for the mirrored live block
> > > migration. We can add the support for switching the backing file in the
> > > drive-reopen
- Original Message -
> From: "Paolo Bonzini"
> To: "Federico Simoncelli"
> Cc: "Stefan Hajnoczi" , qemu-devel@nongnu.org,
> kw...@redhat.com, mtosa...@redhat.com
> Sent: Tuesday, February 28, 2012 6:36:57 PM
> Subject: Re: [Qemu-devel] Li
Il 28/02/2012 18:15, Federico Simoncelli ha scritto:
> Thank you for getting this. Being able to have a bogus backing file was
> a bonus but it's not really required for the mirrored live block migration.
> We can add the support for switching the backing file in the drive-reopen
> part.
Wait, it'
Il 28/02/2012 16:47, Stefan Hajnoczi ha scritto:
> At this stage we have dst/hd0snap1 opened with BDRV_O_NO_BACKING. If
> it has no backing file and the guest issues a write request that is
> smaller than a cluster in the image file, the untouched areas of that
> cluster will be populated with zer
- Original Message -
> From: "Stefan Hajnoczi"
> To: "Federico Simoncelli"
> Cc: qemu-devel@nongnu.org, kw...@redhat.com, mtosa...@redhat.com
> Sent: Tuesday, February 28, 2012 4:47:48 PM
> Subject: Re: [Qemu-devel] Live Block Migration using Mirroring
On Wed, Feb 22, 2012 at 5:13 PM, Federico Simoncelli
wrote:
> Step 3 - Mirrored Live Snapshot
> ===
> A mirrored live snapshot is issued using src/hd0snap1 and dst/hd0snap1 as
> image files. (Where "<-" stands for "has backing file")
>
> [src/hd0base] <- [src/hd0snap1]
- Original Message -
> From: "Stefan Hajnoczi"
> To: "Federico Simoncelli"
> Cc: qemu-devel@nongnu.org, kw...@redhat.com, mtosa...@redhat.com
> Sent: Thursday, February 23, 2012 5:35:23 PM
> Subject: Re: [Qemu-devel] Live Block Migration using Mirrori
On Wed, Feb 22, 2012 at 5:13 PM, Federico Simoncelli
wrote:
> recently I've been working on live block migration combining the live
> snapshots and the blkmirror patch sent by Marcelo Tosatti few months ago.
>
> The design is summarized at this url as "Mirrored-Snapshot":
>
> http://www.ovirt.org
- Original Message -
> From: "Stefan Hajnoczi"
> To: "Federico Simoncelli"
> Cc: qemu-devel@nongnu.org, kw...@redhat.com, mtosa...@redhat.com
> Sent: Thursday, February 23, 2012 4:47:38 PM
> Subject: Re: [Qemu-devel] Live Block Migration using Mirrori
On Wed, Feb 22, 2012 at 5:13 PM, Federico Simoncelli
wrote:
> Preparation
> ===
>
> $ mkdir /tmp/{src/dst}
> $ qemu-img create -f qcow2 /tmp/src/hd0base.qcow2 20G
> Formatting '/tmp/src/hd0base.qcow2', fmt=qcow2 size=21474836480
> encryption=off cluster_size=65536
>
> Step 1 - Initital Sce
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