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Re: [Xen-devel] consistent LVM snapshot of domUs from dom0

On Mon, 24 Dec 2007, Mark Williamson wrote:
Hi Mark,
is there some progress regarding this subject? Still, if there is something I could help with, please do not hesitate to tell me what could I do...

Yes, I think that's a sensible first step to take.  Later on, we could perhaps
look into putting some more smarts in, e.g. doing the snapshot creation
automatically in the case that an LVM volume or QCow virtual disk is already
being used.

I hadn't come across freeze/thaw_bdev before - I'd found a lock / unlock call
for filesystem locking somewhere that looked promising but not implemented it
yet.  I imagine it might boil down to a similar thing in the end.

Either way, being able to freeze specific block devices could be useful for
backup purposes.  There's no point freezing filesystems that are not used to
store backed-up data, for instance!

Yup, agree :)

OK, I'll try and get some code online at some point and let you know when it's

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