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[Qemu-devel] [libvirt] Re: live snapshot wiki updated
From: |
Nicolas Sebrecht |
Subject: |
[Qemu-devel] [libvirt] Re: live snapshot wiki updated |
Date: |
Wed, 20 Jul 2011 12:15:02 +0200 |
User-agent: |
Mutt/1.5.20 (2009-06-14) |
The 20/07/11, Daniel P. Berrange wrote:
> To make the decision whether the filename from QEMU is valid, we have
> to parse the master image header data to see if the filename actually
> matches the backing file required by the image assigned to the guest.
Actually, libvirt should not have to worry if the filename provided by
QEMU is valid. I think it should trust QEMU. If QEMU doesn't provide
information others can trust; it should be fixed at QEMU side.
> We're not fighting over the internals of metadata. We just need to know
> ahead of launching QEMU, what backing files an image has & what format
> they are in. We do that by reading at the metadata headers of the disk
> images. We never attempt to write to the disk images. Either someone
> provides a library todo that, or we write the probing code for each
> file format in libvirt. Currently we have the latter.
This is what I would call "fighting with QEMU internals". How do you
prevent from concurrency access and modifications? Ideally speacking
libvirt should be able to co-exist with foreign implementations, all
requesting QEMU.
--
Nicolas Sebrecht
- Re: [Qemu-devel] live snapshot wiki updated, (continued)
- Re: [Qemu-devel] live snapshot wiki updated, Jes Sorensen, 2011/07/19
- Re: [Qemu-devel] live snapshot wiki updated, Eric Blake, 2011/07/19
- Re: [Qemu-devel] live snapshot wiki updated, Jes Sorensen, 2011/07/19
- Re: [Qemu-devel] live snapshot wiki updated, Eric Blake, 2011/07/19
- Re: [Qemu-devel] live snapshot wiki updated, Jes Sorensen, 2011/07/19
- Re: [Qemu-devel] live snapshot wiki updated, Stefan Hajnoczi, 2011/07/19
- Re: [Qemu-devel] live snapshot wiki updated, Daniel P. Berrange, 2011/07/19
- Re: [Qemu-devel] live snapshot wiki updated, Markus Armbruster, 2011/07/20
- Re: [Qemu-devel] live snapshot wiki updated, Jes Sorensen, 2011/07/20
- Re: [Qemu-devel] live snapshot wiki updated, Daniel P. Berrange, 2011/07/20
- [Qemu-devel] [libvirt] Re: live snapshot wiki updated,
Nicolas Sebrecht <=
- Re: [Qemu-devel] [libvirt] Re: live snapshot wiki updated, Daniel P. Berrange, 2011/07/20
- Re: [Qemu-devel] [libvirt] live snapshot wiki updated, Stefan Hajnoczi, 2011/07/20
- Message not available
- Message not available
- Message not available
- Re: [Qemu-devel] [libvirt] live snapshot wiki updated, Eric Blake, 2011/07/21
- Message not available
- Message not available
- Re: [Qemu-devel] live snapshot wiki updated, Stefan Hajnoczi, 2011/07/21
- Re: [Qemu-devel] live snapshot wiki updated, Blue Swirl, 2011/07/21
- Re: [Qemu-devel] live snapshot wiki updated, Stefan Hajnoczi, 2011/07/22
- Re: [Qemu-devel] live snapshot wiki updated, Blue Swirl, 2011/07/22
- Re: [Qemu-devel] live snapshot wiki updated, Kevin Wolf, 2011/07/22
- Re: [Qemu-devel] live snapshot wiki updated, Stefan Hajnoczi, 2011/07/22
- Re: [Qemu-devel] live snapshot wiki updated, Blue Swirl, 2011/07/22