Displaying 2 results from an estimated 2 matches for "aaaaxxxxxxxxxxxx".
2014 Jul 02
7
virsh blockcopy: doesn't seem to flatten the chain by default
Versions
--------
(Libvirt locally built from a recent git commit -ec7b922):
$ rpm -q libvirt-daemon-kvm qemu-system-x86
libvirt-daemon-kvm-1.2.6-1.fc20.x86_64
qemu-system-x86-2.0.0-1.fc21.x86_64
Test
----
[All images are qcow2 files.]
We have this simple chain:
base <- snap1
Let's quickly examine the contents of 'base' and 'snap1' images:
2014 Jul 03
0
Re: virsh blockcopy: doesn't seem to flatten the chain by default
..., let's look at it like this. When you
start your guest originally, you have a big blank disk being tracked by
the base image, and write into some sectors of that disk. So, use "A"
to represent the initial OS install, and "X" to represent a sector not
yet written:
base: AAAAXXXXXXXXXXXX
====
guest: AAAAXXXXXXXXXXXX
Then, you modify the guest to write the file foo, represent that with
"B" for the sectors that were modified:
base: AAABBBBBXXXXXXXX
====
guest: AAABBBBBXXXXXXXX
then you take a snapshot, at the point you take it, snap1 is completely
empty, but notice t...