[libvirt] server side copy from one volume to another

[Vasiliy Tolstov]

2017-04-18 8:39 GMT+03:00 Michal Privoznik <mprivozn at redhat.com>:
> s that right? Here I'm successfully cloning a volume across two storage pools:


Yes, it works but....
Source image:
image: /var/lib/libvirt/images/sda/143177
file format: qcow2
virtual size: 5.0G (5368709120 bytes)
disk size: 902M
cluster_size: 65536
Format specific information:
    compat: 0.10
    refcount bits: 16

Dest image:
image: /var/lib/libvirt/images/sda/test
file format: qcow2
virtual size: 5.0G (5368709120 bytes)
disk size: 902M
cluster_size: 65536
Format specific information:
    compat: 0.10
    refcount bits: 16


But
-rw------- 1 root 908M Apr 18 13:59 143177
-rw------- 1 root 902M Apr 18 13:59 test

Why size is changed on destination image? In case of cp
--spwarse=always size does not changed.