def save(
self,
trial: Trial,
storage: str = _TuneCheckpoint.PERSISTENT,
result: Optional[Dict] = None,
) -> _TuneCheckpoint:
"""Saves the trial's state to a checkpoint asynchronously.
Args:
trial: The trial to be saved.
storage: Where to store the checkpoint. Defaults to
PERSISTENT.
result: The state of this trial as a dictionary to be saved.
If result is None, the trial's last result will be used.
Returns:
Checkpoint object, or None if an Exception occurs.
"""
logger.debug(f"saving trial {trial}")
result = result or trial.last_result
with self._change_working_directory(trial):
if storage == _TuneCheckpoint.MEMORY:
value = trial.runner.save_to_object.remote()
checkpoint = _TuneCheckpoint(storage, value, result)
trial.on_checkpoint(checkpoint)
else:
value = trial.runner.save.remote()
checkpoint = _TuneCheckpoint(storage, value, result)
trial.saving_to = checkpoint
self._futures[value] = (ExecutorEventType.SAVING_RESULT, trial)
return checkpoint
def checkpoint(self):
return _TuneCheckpoint(_TuneCheckpoint.MEMORY, "None", {})