hello, everyone!
We create a snapshot chain as follows map [1], if we delete "Snapshot1",
it will call [2] in vdsm, in last, "virsh blockcommit' will be called,
but if we delete "Snapshot2", it will call [3] in vdsm, at last we will call
[4], it use qemu.cmd "commit". , why we don't use "virsh blockpull" to merge
snapshot to topVolume?
is qemu.cmd "commit" better?
[1]
[2]
https://github.com/oVirt/vdsm/blob/2b98daffb2c2dec1bbbd3427d3d32861d77f01a7/lib/vdsm/virt/vm.py#L5744
[3]
https://github.com/oVirt/vdsm/blob/98e6a5d1ad1b097b9c993dca33372f970a3adce4/lib/vdsm/API.py#L1655
[4]
https://github.com/oVirt/vdsm/blob/98e6a5d1ad1b097b9c993dca33372f970a3adce4/lib/vdsm/storage/qemuimg.py#L218
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