def task_log_get_all(self, ctxt, task_name, period_beginning,
                         period_ending, host=None, state=None):
        cctxt = self.client.prepare(version='1.3')
        return cctxt.call(ctxt, 'task_log_get_all',
                          task_name=task_name,
                          period_beginning=period_beginning,
                          period_ending=period_ending,
                          host=host, state=state)
Get the task logs from the DB in child cells.
dataset/ETHPy150Open BU-NU-CLOUD-SP16/Trusted-Platform-Module-nova/nova/cells/rpcapi.py/CellsAPI.task_log_get_all