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
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":
http://www.ovirt.org/wiki/Features/Design/StorageLiveMigration
The design assumes tha
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