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Re: [Qemu-devel] Re: snapshot vs COW?
From: |
Jamie Lokier |
Subject: |
Re: [Qemu-devel] Re: snapshot vs COW? |
Date: |
Sun, 14 Dec 2008 18:12:52 +0000 |
User-agent: |
Mutt/1.5.13 (2006-08-11) |
walt wrote:
> Jun Koi wrote:
> >Hi,
> >
> > From what I see, both snapshot and COW features can be used to try
> >some changes on the file image before we the change back to the
> >original image.
> >
> >But what is the advantages of snapshot over COW, and in which case we
> >should use snapshot, but not COW? Vice verse, when COW is more
> >appropriate?
> >
> >Many thanks,
> >Jun
>
> COW is a nice feature but it is currently broken, so don't use it
> until it gets fixed. When you commit any changes your backing file
> will be corrupted.
Aieee! I use COW instead of snapshots in my management scripts,
because snapshots are harder to manage.
Is the COW brokenness documented? What version did it start being broken?
-- Jamie