From: Avi Kivity <avi@redhat.com>
To: Anthony Liguori <anthony@codemonkey.ws>
Cc: Jes.Sorensen@redhat.com, Marcelo Tosatti <mtosatti@redhat.com>,
qemu-devel@nongnu.org
Subject: Re: [Qemu-devel] Re: [patch 2/3] Add support for live block copy
Date: Sun, 27 Feb 2011 11:22:01 +0200 [thread overview]
Message-ID: <4D6A17B9.2020303@redhat.com> (raw)
In-Reply-To: <4D669953.40808@codemonkey.ws>
On 02/24/2011 07:45 PM, Anthony Liguori wrote:
>
> Yeah, it feels like we're introducing QEMU level RAID.
We already did, with sheepdog (well the RAID code is really outside qemu
itself).
> At what point are we going to add RAID5 support and not just RAID1.
> And it certainly begs the question of whether this use-case can be
> satisfied by just using Linux's RAID stack leaving one drive degraded
> and enabling the other drive when the time comes to fail over.
The magic word is btrfs, we already have atomic live copy outside qemu
('cp --reflink'). If you also want an atomic switch you have to move it
inside qemu so you can switch to the new file.
Using one of the Linux RAID-1 implementations (md, dm, or drbd) is also
possible but these are really designed for block devices, not files.
--
error compiling committee.c: too many arguments to function
next prev parent reply other threads:[~2011-02-27 9:22 UTC|newest]
Thread overview: 76+ messages / expand[flat|nested] mbox.gz Atom feed top
2011-02-22 17:00 [Qemu-devel] [patch 0/3] live block copy (v2) Marcelo Tosatti
2011-02-22 17:00 ` [Qemu-devel] [patch 1/3] add migration_active function Marcelo Tosatti
2011-02-22 17:00 ` [Qemu-devel] [patch 2/3] Add support for live block copy Marcelo Tosatti
2011-02-22 20:50 ` [Qemu-devel] " Anthony Liguori
2011-02-22 21:07 ` Marcelo Tosatti
2011-02-22 21:11 ` Anthony Liguori
2011-02-22 23:09 ` Marcelo Tosatti
2011-02-22 23:14 ` Anthony Liguori
2011-02-23 13:01 ` Avi Kivity
2011-02-23 14:35 ` Anthony Liguori
2011-02-23 15:31 ` Avi Kivity
2011-02-23 16:01 ` Anthony Liguori
2011-02-23 16:14 ` Avi Kivity
2011-02-23 16:28 ` Anthony Liguori
2011-02-23 17:18 ` Avi Kivity
2011-02-23 20:18 ` Anthony Liguori
2011-02-23 20:44 ` Marcelo Tosatti
2011-02-23 21:41 ` Anthony Liguori
2011-02-24 14:39 ` Marcelo Tosatti
2011-02-24 7:37 ` Markus Armbruster
2011-02-24 8:54 ` Avi Kivity
2011-02-24 15:00 ` Anthony Liguori
2011-02-24 15:22 ` Avi Kivity
2011-02-24 17:58 ` Anthony Liguori
2011-02-27 9:10 ` Avi Kivity
2011-02-27 9:55 ` Dor Laor
2011-02-27 13:49 ` Anthony Liguori
2011-02-27 16:02 ` Dor Laor
2011-02-27 17:25 ` Anthony Liguori
2011-02-28 8:58 ` Dor Laor
2011-02-27 14:00 ` Anthony Liguori
2011-02-27 15:31 ` Avi Kivity
2011-02-27 17:41 ` Anthony Liguori
2011-02-28 8:38 ` Avi Kivity
2011-02-28 12:45 ` Anthony Liguori
2011-02-28 13:21 ` Avi Kivity
2011-02-28 17:33 ` Anthony Liguori
2011-02-28 17:47 ` Avi Kivity
2011-02-28 18:12 ` Anthony Liguori
[not found] ` <4D6CBECF.8090805@redhat.c! om>
[not found] ` <4D6CB556.5060401@redhat.c! om>
2011-03-01 8:59 ` Dor Laor
2011-03-02 12:39 ` Anthony Liguori
2011-03-02 13:00 ` Avi Kivity
2011-03-02 15:07 ` Anthony Liguori
2011-03-01 9:39 ` Avi Kivity
2011-03-01 15:51 ` Anthony Liguori
2011-03-01 22:27 ` Dor Laor
2011-03-02 16:30 ` Avi Kivity
2011-03-02 21:55 ` Anthony Liguori
2011-02-28 18:56 ` Marcelo Tosatti
2011-03-01 9:45 ` Avi Kivity
2011-02-23 16:17 ` Peter Maydell
2011-02-23 16:30 ` Anthony Liguori
2011-02-24 5:41 ` [Qemu-devel] Unsubsribing James Brown
2011-02-24 10:00 ` Stefan Hajnoczi
2011-02-23 17:26 ` [Qemu-devel] Re: [patch 2/3] Add support for live block copy Markus Armbruster
2011-02-23 20:06 ` Anthony Liguori
2011-02-24 12:15 ` Markus Armbruster
2011-02-25 7:16 ` Stefan Hajnoczi
2011-02-23 17:49 ` Marcelo Tosatti
2011-02-24 8:58 ` Avi Kivity
2011-02-24 15:14 ` Marcelo Tosatti
2011-02-24 15:28 ` Avi Kivity
2011-02-24 16:39 ` Marcelo Tosatti
2011-02-24 17:32 ` Avi Kivity
2011-02-24 17:45 ` Anthony Liguori
2011-02-27 9:22 ` Avi Kivity [this message]
2011-02-23 12:46 ` Avi Kivity
2011-02-22 20:50 ` Anthony Liguori
2011-02-22 21:16 ` [Qemu-devel] " Anthony Liguori
2011-02-23 19:06 ` Anthony Liguori
2011-02-26 0:02 ` Marcelo Tosatti
2011-02-26 13:45 ` Anthony Liguori
2011-02-28 19:09 ` Marcelo Tosatti
2011-03-01 2:35 ` Marcelo Tosatti
2011-02-26 15:32 ` Anthony Liguori
2011-02-22 17:00 ` [Qemu-devel] [patch 3/3] do not allow migration if block copy in progress Marcelo Tosatti
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