This workflow uses MLFlow to control the operation.
mlflow run -e prepare -P output_dir=output -P n_workers=5 -P n_files=4 -P n-eta-sections=1 -P n-phi-sections=1 .
mlflow run -e stage -P input_dir=output -P stage_dir=xxx -Psector=g001 .
mlflow run -e train -P stage_dir=xxx -P output_dir=xxx .