From: Kevin Wolf <kwolf@redhat.com>
To: Anthony Liguori <anthony@codemonkey.ws>
Cc: Chunqiang Tang <ctang@us.ibm.com>,
qemu-devel@nongnu.org, Markus Armbruster <armbru@redhat.com>,
Stefan Hajnoczi <stefanha@linux.vnet.ibm.com>
Subject: Re: [Qemu-devel] Re: Strategic decision: COW format
Date: Fri, 18 Feb 2011 21:49:37 +0100 [thread overview]
Message-ID: <4D5EDB61.2090509@redhat.com> (raw)
In-Reply-To: <4D5ECCE7.2060607@codemonkey.ws>
Am 18.02.2011 20:47, schrieb Anthony Liguori:
> On 02/18/2011 01:11 PM, Kevin Wolf wrote:
>>> A new file format like fvd would be a challenge for the existing ones.
>>> Declare its support as unsupported or experimental, but let users
>>> decide which one is best suited to their needs!
>>>
>> Basically this is what we did for QED. In hindsight I consider it a
>> mistake because it set a bad precedence of inventing something new
>> instead of fixing what's there.
>
> I don't see how qcow3 is fixing something that's there since it's still
> an incompatible format.
>
> It'd be a stronger argument if you were suggesting something that was
> still fully compatible with qcow2 but once compatibility is broken, it's
> broken.
It's really more like adding an incompatible feature flag in QED. You
still have one implementation for old and new images instead of
splitting up development efforts, you still have all of the features and
so on. It's a completely different story than QED.
Kevin
next prev parent reply other threads:[~2011-02-18 20:48 UTC|newest]
Thread overview: 87+ messages / expand[flat|nested] mbox.gz Atom feed top
[not found] <OF3C9DAE9F.EC6B5878-ON85257826.00715C10-85257826.007A14FB@LocalDomain>
2011-02-15 19:45 ` [Qemu-devel] Re: Comparing New Image Formats: FVD vs. QED Chunqiang Tang
2011-02-16 12:34 ` Kevin Wolf
2011-02-17 16:04 ` Chunqiang Tang
2011-02-18 9:12 ` Strategic decision: COW format (was: [Qemu-devel] Re: Comparing New Image Formats: FVD vs. QED) Markus Armbruster
2011-02-18 9:57 ` [Qemu-devel] Re: Strategic decision: COW format Kevin Wolf
2011-02-18 14:20 ` Anthony Liguori
2011-02-22 8:37 ` Markus Armbruster
2011-02-22 8:56 ` Kevin Wolf
2011-02-22 10:21 ` Markus Armbruster
2011-02-22 15:57 ` Anthony Liguori
2011-02-22 16:15 ` Kevin Wolf
2011-02-22 18:18 ` Anthony Liguori
2011-02-23 9:13 ` Kevin Wolf
2011-02-23 14:21 ` Anthony Liguori
2011-02-23 14:55 ` Kevin Wolf
2011-02-23 13:43 ` Avi Kivity
2011-02-23 14:23 ` Anthony Liguori
2011-02-23 14:38 ` Kevin Wolf
2011-02-23 15:29 ` Anthony Liguori
2011-02-23 15:36 ` Avi Kivity
2011-02-23 15:47 ` Anthony Liguori
2011-02-23 15:59 ` Avi Kivity
2011-02-23 15:54 ` Kevin Wolf
2011-02-23 15:23 ` Avi Kivity
2011-02-23 15:31 ` Anthony Liguori
2011-02-23 15:37 ` Avi Kivity
2011-02-23 15:50 ` Anthony Liguori
2011-02-23 16:03 ` Avi Kivity
2011-02-23 16:04 ` Anthony Liguori
2011-02-23 16:15 ` Kevin Wolf
2011-02-25 11:20 ` Pavel Dovgaluk
[not found] ` <-1737654525499315352@unknownmsgid>
2011-02-25 13:22 ` Stefan Hajnoczi
2011-02-23 15:52 ` Anthony Liguori
2011-02-23 15:59 ` Gleb Natapov
2011-02-23 16:00 ` Avi Kivity
2011-02-23 15:33 ` Daniel P. Berrange
2011-02-23 15:38 ` Avi Kivity
2011-02-18 17:43 ` Stefan Weil
2011-02-18 19:11 ` Kevin Wolf
2011-02-18 19:47 ` Anthony Liguori
2011-02-18 20:49 ` Kevin Wolf [this message]
2011-02-18 20:50 ` Anthony Liguori
2011-02-18 21:27 ` Kevin Wolf
2011-02-19 17:19 ` Stefan Hajnoczi
2011-02-18 20:31 ` Anthony Liguori
2011-02-19 12:27 ` [Qemu-devel] Bugs in the VDI Block Device Driver Chunqiang Tang
2011-02-19 16:21 ` Stefan Hajnoczi
2011-02-19 18:49 ` Stefan Weil
2011-02-20 22:13 ` [Qemu-devel] Re: Strategic decision: COW format Aurelien Jarno
2011-02-21 8:59 ` Kevin Wolf
2011-02-21 13:44 ` Stefan Hajnoczi
2011-02-21 14:10 ` Kevin Wolf
2011-02-21 15:16 ` Anthony Liguori
2011-02-21 15:26 ` Kevin Wolf
2011-02-23 3:32 ` Chunqiang Tang
2011-02-23 13:20 ` Markus Armbruster
[not found] ` <OFAEB4CD91.BE989F29-ON8525783F.007366B8-85257840.00130B47@LocalDomain>
2011-03-13 5:51 ` Chunqiang Tang
2011-03-13 17:48 ` Anthony Liguori
2011-03-14 2:28 ` Chunqiang Tang
2011-03-14 13:22 ` Anthony Liguori
2011-03-14 13:53 ` Chunqiang Tang
2011-03-14 14:02 ` Anthony Liguori
2011-03-14 14:21 ` Kevin Wolf
2011-03-14 14:35 ` Chunqiang Tang
2011-03-14 14:49 ` Anthony Liguori
2011-03-14 15:05 ` Stefan Hajnoczi
2011-03-14 15:08 ` Kevin Wolf
2011-03-14 14:26 ` Stefan Hajnoczi
2011-03-14 14:30 ` Chunqiang Tang
2011-03-14 14:15 ` Kevin Wolf
2011-03-14 14:25 ` Chunqiang Tang
2011-03-14 14:31 ` Stefan Hajnoczi
2011-03-14 16:32 ` Chunqiang Tang
2011-03-14 17:57 ` Kevin Wolf
2011-03-14 19:23 ` Chunqiang Tang
2011-03-14 20:16 ` Kevin Wolf
[not found] ` <OF7C2FDD40.E76A4E14-ON85257853.005ADD68-85257853.005AF16E@LocalDomain>
2011-03-14 21:32 ` Chunqiang Tang
2011-03-14 14:34 ` Kevin Wolf
2011-03-14 14:47 ` Anthony Liguori
2011-03-14 15:03 ` Kevin Wolf
2011-03-14 15:13 ` Anthony Liguori
2011-03-14 15:04 ` Chunqiang Tang
2011-03-14 15:07 ` Stefan Hajnoczi
2011-03-14 10:12 ` Kevin Wolf
2011-02-22 8:40 ` Markus Armbruster
2011-02-16 13:21 ` [Qemu-devel] Re: Comparing New Image Formats: FVD vs. QED Stefan Hajnoczi
2011-02-17 16:04 ` Chunqiang Tang
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