1Start NBD server 2{"execute": "blockdev-add", "arguments": {"driver": "raw", "file": {"driver": "nbd", "reconnect-delay": 10, "server": {"path": "TEST_DIR/PID-nbd-sock", "type": "unix"}}, "node-name": "backup0"}} 3{"return": {}} 4{"execute": "blockdev-backup", "arguments": {"device": "drive0", "speed": 1048576, "sync": "full", "target": "backup0"}} 5{"return": {}} 6Backup job is started 7Kill NBD server 8Backup job is still in progress 9{"execute": "block-job-set-speed", "arguments": {"device": "drive0", "speed": 0}} 10{"return": {}} 11Start NBD server 12Backup completed: 5242880 13{"execute": "blockdev-del", "arguments": {"node-name": "backup0"}} 14{"return": {}} 15Kill NBD server 16