I have an qcow2 image and I mount it to /dev/nbd then write somethin. Then I take internal snapshot in the qcow2.
I enter the command qemu-img info qcow2 It shows: image: qcow2 file format: qcow2 virtual size: 30G disk size:4M xxxxx Snapshot list: ID, TAG, VM SIZE, DATE, VM CLOCK 1, snap1, 0, xxxx-xx-xx, 00:00:00 The field of "VM SIZE" is zero in my host machine. What does it mean and why is it an zero?