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From: Anthony Liguori <aliguori@us.ibm.com>
To: Kevin Wolf <kwolf@redhat.com>
Cc: Marcelo Tosatti <mtosatti@redhat.com>,
	agl@linux.vnet.ibm.com,
	Stefan Hajnoczi <stefanha@linux.vnet.ibm.com>,
	jes sorensen <jes.sorensen@redhat.com>,
	Dor Laor <dlaor@redhat.com>,
	qemu-devel@nongnu.org, Avi Kivity <avi@redhat.com>
Subject: Re: [Qemu-devel] Image streaming and live block copy
Date: Fri, 17 Jun 2011 07:21:31 -0500	[thread overview]
Message-ID: <4DFB46CB.2080706@us.ibm.com> (raw)
In-Reply-To: <4DFB1205.9040408@redhat.com>

On 06/17/2011 03:36 AM, Kevin Wolf wrote:
> Am 16.06.2011 16:52, schrieb Marcelo Tosatti:
>> On Thu, Jun 16, 2011 at 03:08:30PM +0200, Kevin Wolf wrote:
>> Over this scheme, you'd have:
>>
>> 1) Block copy.
>> Reopen image to be copied with
>> blkstream:/path/to/current-image:/path/to/destination-image,
>> background read sectors 0...N.
>>
>> 2) Image stream:
>> blkstream:remote-image:/path/to/local-image,
>> background read sectors 0...N.
>>
>> Where remote-image is remote accessible image such as NBD.
>
> I think that should work.
>
> By the way, we'll get problems with the colon syntax. Without -blockdev
> we'll have to invent a new syntax, maybe with brackets:
>
> blkstream:[nbd:localhost]:out.qcow2

So what's the main issue with -blockdev today?  Just need someone to 
spend some time implementing it?

Also, it would be a useful exercise to try and capture some of this in 
the wiki.  That makes it a bit easier to reference as we move forward.

Regards,

Anthony Liguori

> Kevin

  parent reply	other threads:[~2011-06-17 13:40 UTC|newest]

Thread overview: 43+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2011-06-14 18:18 [Qemu-devel] [PATCH 00/13] QED image streaming Stefan Hajnoczi
2011-06-14 18:18 ` [Qemu-devel] [PATCH 01/13] qemu-config: }, { -> }, { to please checkpatch.pl Stefan Hajnoczi
2011-06-14 18:18 ` [Qemu-devel] [PATCH 02/13] block: add -drive copy-on-read=on|off Stefan Hajnoczi
2011-06-14 18:18 ` [Qemu-devel] [PATCH 03/13] qed: replace is_write with flags field Stefan Hajnoczi
2011-06-14 18:18 ` [Qemu-devel] [PATCH 04/13] qed: extract qed_start_allocating_write() Stefan Hajnoczi
2011-06-14 18:18 ` [Qemu-devel] [PATCH 05/13] qed: make qed_aio_write_alloc() reusable Stefan Hajnoczi
2011-06-14 18:18 ` [Qemu-devel] [PATCH 06/13] qed: add support for copy-on-read Stefan Hajnoczi
2011-06-14 18:18 ` [Qemu-devel] [PATCH 07/13] qed: avoid deadlock on emulated synchronous I/O Stefan Hajnoczi
2011-06-14 18:18 ` [Qemu-devel] [PATCH 08/13] qerror: add qerror_from_args() to create qerror objects Stefan Hajnoczi
2011-06-14 18:18 ` [Qemu-devel] [PATCH 09/13] block: add bdrv_aio_copy_backing() Stefan Hajnoczi
2011-06-14 18:18 ` [Qemu-devel] [PATCH 10/13] qmp: add QMP support for stream commands Stefan Hajnoczi
2011-06-14 18:18 ` [Qemu-devel] [PATCH 11/13] block: add -drive stream=on|off Stefan Hajnoczi
2011-06-14 18:18 ` [Qemu-devel] [PATCH 12/13] qed: intelligent streaming implementation Stefan Hajnoczi
2011-06-14 18:18 ` [Qemu-devel] [PATCH 13/13] trace: trace bdrv_aio_readv/writev error paths Stefan Hajnoczi
2011-06-15 10:46 ` [Qemu-devel] [PATCH 00/13] QED image streaming Philipp Hahn
2011-06-15 12:18   ` Stefan Hajnoczi
2011-06-16 12:35 ` [Qemu-devel] Image streaming and live block copy (was: [PATCH 00/13] QED image streaming) Kevin Wolf
2011-06-16 12:49   ` [Qemu-devel] Image streaming and live block copy Avi Kivity
2011-06-16 13:08     ` Kevin Wolf
2011-06-16 13:38       ` Avi Kivity
2011-06-16 14:52       ` Marcelo Tosatti
2011-06-16 15:30         ` Stefan Hajnoczi
2011-06-17 12:31           ` Marcelo Tosatti
2011-06-18  9:15             ` Stefan Hajnoczi
2011-06-18  9:17               ` Stefan Hajnoczi
2011-06-19 16:02                 ` Dor Laor
2011-06-24  9:28                   ` Stefan Hajnoczi
2011-06-26 12:50                     ` Dor Laor
2011-06-27  7:48                       ` Kevin Wolf
2011-06-27  9:13                         ` Dor Laor
2011-06-17 13:54           ` Marcelo Tosatti
2011-06-17  8:36         ` Kevin Wolf
2011-06-17  8:57           ` Stefan Hajnoczi
2011-06-17  9:22             ` Kevin Wolf
2011-06-17 10:11               ` Stefan Hajnoczi
2011-06-17 12:21           ` Anthony Liguori [this message]
2011-06-17 13:04           ` Marcelo Tosatti
2011-06-17 13:50           ` Marcelo Tosatti
2011-06-16 13:10   ` Anthony Liguori
2011-06-16 13:50     ` Kevin Wolf
2011-06-16 14:38   ` [Qemu-devel] Image streaming and live block copy (was: [PATCH 00/13] QED image streaming) Marcelo Tosatti
2011-06-16 14:55     ` Marcelo Tosatti
2011-06-17  8:21     ` [Qemu-devel] Image streaming and live block copy Kevin Wolf

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