Re: [ovirt-devel] virt-v2v intergration with vdsm
On Thu, Oct 02, 2014 at 04:23:31AM -0400, Arik Hadas wrote:
- the second option will be based on estimations of the actual size
of the converted disks and since all we know is their
virtual-sizes, we might allocated much more space that we need so
we'll need another phase of shrinking the disks according to the
amount of data that was actually written - in this case the whole
operation will be slower than it could be
Although estimation is difficult, it's a bit more sophisticated than
just the virtual size. See:
https://github.com/libguestfs/libguestfs/blob/master/v2v/v2v.ml#L488
Actually I need to test this code on some sample guests to see how
close the estimate is to the reality.
Rich.
--
Richard Jones, Virtualization Group, Red Hat http://people.redhat.com/~rjones
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