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Re: [Qemu-devel] [PATCH V2 3/4] blockdev: Allow snapshoting of protocols
From: |
Eric Blake |
Subject: |
Re: [Qemu-devel] [PATCH V2 3/4] blockdev: Allow snapshoting of protocols. |
Date: |
Tue, 29 Jan 2013 09:24:11 -0700 |
User-agent: |
Mozilla/5.0 (X11; Linux x86_64; rv:17.0) Gecko/20130110 Thunderbird/17.0.2 |
On 01/29/2013 07:27 AM, Benoît Canet wrote:
>> base1 [file] --- base1 [qcow2] --- snap1.qcow2 --\
>> base2 [file] --- base2 [qcow2] --- snap2.qcow2 --->-- quorum
>> base3 [file] --- base3 [qcow2] --- snap3.qcow2 --/
For that matter, I think it would be useful to have a quorum where the
data is duplicated between different formats, such as:
file1 [raw] --\
base2 [raw] --- snap2.qcow2 [qcow2] -->-- quorum
base3 [qed] --- snap3.qed [qed] --/
In that case, you NEED to be able to pass in the protocol of each
underlying device _as part of opening the quorum_, something like:
quorum:2/3:file1[raw]:snap2.qcow2[qcow2]:snap3.qed[qed]
or some such punctuation. And of course, that means you'd have to
extend your escaping mechanism to allow escaping of whatever syntax you
use for declaring a per-member format.
--
Eric Blake eblake redhat com +1-919-301-3266
Libvirt virtualization library http://libvirt.org
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- Re: [Qemu-devel] [PATCH V2 2/4] block: make path_hash_protocol public., (continued)
- [Qemu-devel] [PATCH V2 1/4] block: Add option to do external snapshot image creation in the block drivers., Benoît Canet, 2013/01/28
- [Qemu-devel] [PATCH V2 3/4] blockdev: Allow snapshoting of protocols., Benoît Canet, 2013/01/28
- Re: [Qemu-devel] [PATCH V2 3/4] blockdev: Allow snapshoting of protocols., Kevin Wolf, 2013/01/29
- Re: [Qemu-devel] [PATCH V2 3/4] blockdev: Allow snapshoting of protocols., Benoît Canet, 2013/01/29
- Re: [Qemu-devel] [PATCH V2 3/4] blockdev: Allow snapshoting of protocols., Kevin Wolf, 2013/01/29
- Re: [Qemu-devel] [PATCH V2 3/4] blockdev: Allow snapshoting of protocols., Benoît Canet, 2013/01/29
- Re: [Qemu-devel] [PATCH V2 3/4] blockdev: Allow snapshoting of protocols., Kevin Wolf, 2013/01/29
- Re: [Qemu-devel] [PATCH V2 3/4] blockdev: Allow snapshoting of protocols., Benoît Canet, 2013/01/29
- Re: [Qemu-devel] [PATCH V2 3/4] blockdev: Allow snapshoting of protocols.,
Eric Blake <=
- Re: [Qemu-devel] [PATCH V2 3/4] blockdev: Allow snapshoting of protocols., Benoît Canet, 2013/01/29
- Re: [Qemu-devel] [PATCH V2 3/4] blockdev: Allow snapshoting of protocols., Kevin Wolf, 2013/01/29
- Re: [Qemu-devel] [PATCH V2 3/4] blockdev: Allow snapshoting of protocols., Benoît Canet, 2013/01/29
[Qemu-devel] [PATCH V2 4/4] block: Optionally block drivers to optionally reopen images after snapshot creation., Benoît Canet, 2013/01/28