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Re: [Qemu-devel] disk image: self-organized format or raw file
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From: |
Eric Blake |
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Subject: |
Re: [Qemu-devel] disk image: self-organized format or raw file |
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Date: |
Tue, 12 Aug 2014 08:07:55 -0600 |
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User-agent: |
Mozilla/5.0 (X11; Linux x86_64; rv:24.0) Gecko/20100101 Thunderbird/24.7.0 |
On 08/12/2014 07:45 AM, 吴兴博 wrote:
[please don't top-post on technical lists]
> Thanks for your information. It's really helpful.
> I think adding a bitmap alongside the raw file ( or just within that file)
Umm, how do you propose to add a bitmap within a raw file? The moment
the file contains metadata, it is no longer raw, but some other format.
You'd need a way to reliably delineate the portion of the file that
contains the bitmap and therefore must not be exposed to the guest.
> would be suffice to distinguish between present or in backing file.
> The idea in FVD looks similar to 'addcow'---use bitmap but delegating
> allocation to FS. However FVD seems to have been ignored by community.
Care to give a pointer to a URL describing the FVD format?
--
Eric Blake eblake redhat com +1-919-301-3266
Libvirt virtualization library http://libvirt.org
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Re: [Qemu-devel] disk image: self-organized format or raw file, Kirill Batuzov, 2014/08/12
Re: [Qemu-devel] disk image: self-organized format or raw file, Eric Blake, 2014/08/12
Re: [Qemu-devel] disk image: self-organized format or raw file, Richard W.M. Jones, 2014/08/12
Re: [Qemu-devel] disk image: self-organized format or raw file, Daniel P. Berrange, 2014/08/12