@property
    def io_workload(self):

        def _get(state, state_type):
            key = "num_%s_%s" % (state_type, state)
            return self.get(key, 0)

        num_builds = _get(vm_states.BUILDING, "vm")
        num_migrations = _get(task_states.RESIZE_MIGRATING, "task")
        num_rebuilds = _get(task_states.REBUILDING, "task")
        num_resizes = _get(task_states.RESIZE_PREP, "task")
        num_snapshots = _get(task_states.IMAGE_SNAPSHOT, "task")
        num_backups = _get(task_states.IMAGE_BACKUP, "task")
        num_rescues = _get(task_states.RESCUING, "task")
        num_unshelves = _get(task_states.UNSHELVING, "task")

        return (num_builds + num_rebuilds + num_resizes + num_migrations +
                num_snapshots + num_backups + num_rescues + num_unshelves)
Calculate an I/O based load by counting I/O heavy operations.
dataset/ETHPy150Open BU-NU-CLOUD-SP16/Trusted-Platform-Module-nova/nova/compute/stats.py/Stats.io_workload