README.md

Training pipeline

The repo contains the source code and pipeline configurations to automate retraining of the test rig forecaster. The code uses Cloud Functions to trigger retraining on Object finalized trigger (see triggers), Cloud Build to automate testing, building and publishing to the Google Container Registry the new Docker image, Vertex AI Pipelines with Kubeflow SDK to orchestrate execution of the pipeline steps, Vertex AI Experiments to track parameters and metrics during training, Tensorboard callback within the training step to record the timeseries of losses and metrics progressions during the training process and finally Vertex AI Model Registry to store the champion models.

Pipeline diagram

Pipeline steps

Step	Description	Inputs	Outputs	Parameters
read-raw-data	Reads raw data files from the GCS raw data bucket storage. Uploads the combined data frame to the interim data directory in the GCS bucket		interim_data all_features	raw_data_path features_path interim_data_path
importer	Imports interim features		interim_features	artifact_uri
build-features	Reads the interim data, builds features (float down casting, removes NaNs and the step zero data, adds the power and time features to the processed data), saves the processed data	interim_features interim_data	processed_data processed_features	features_path processed_data_path
split-data	Splits processed data into train and test data	processed_data	train_data test_data	train_data_size
import-forecast-features	Imports forecast features		forecast_features	features_path
train	Instantiates, trains the RNN model on the train dataset. Saves the trained scaler and the keras model to the metadata store, logs the training metrics and tensorboard event file	train_data	scaler_model keras_model train_metrics parameters	project_id region feature lookback lstm_units learning_rate epochs batch_size patience timestamp train_data_size pipelines_path
evaluate	Evaluates the trained keras model, saves the evaluation metrics to the metadata store	test_data scaler_model keras_model	eval_metrics	project_id region feature lookback batch_size timestamp
import-champion-metrics	Imports champion metrics		champion_metrics	features_path
compare-models	Compares evaluation metrics of the trained (challenger) model and the champion (the one in the model registry)	eval_metrics champion_metrics		evaluation_metric absolute_difference
upload-model-to-registry	Uploads the scaler and keras models to the models registry. Uploads the parameters and metrics of the model	parameters scaler_model keras_model eval_metrics		feature project_id region deploy_image models_path

Directed acyclic graph