I am experimenting with the blockcopy command, and after figuring out
how to integrate qemu-nbd, nbd-client and
dumpxml/undefine/blockcopy/define/et. al. I have one remaining question:
What's the point?
The "replication" disk file is not, from what I can ascertain, bootable.
I expect this operation to create a pristine copy of my source qcow2
file (at a given point in time) which implies that I can swap that copy
in and use it just like the original.
Neither using --finish nor --pivot (both appear successful) give me a
mirror that seems to serve any purpose. It seems especially pointless if
I use --pivot because anything that happens after the pivot ends up lost
if I don't actually have a usable qcow2 file.
I find lots of discussion online about getting the steps to work, but as
yet find nothing about using the resulting file.
What am I missing here?
libvirt (1.2.2) and qemu (2.2.0) as distributed with Ubuntu Trusty.
--
Gary R Hook
Senior Kernel Engineer
NIMBOXX, Inc
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