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Setup

pip install outerbounds metaflow-ray==0.1.3

Manual mode

To run training from scratch, without any pre-trained weights:

python train_flow.py --environment=fast-bakery run

Checkpoints are persisted in the Metaflow datastore, in a location unique to each task runtime. Notice the current.ray_storage_path variable exposed in Metaflow step annotated with @metaflow_ray. This variable can be passed to Ray's RunConfig(storage_path=...) value.

To run training from a previous run's checkpoint - which you can find in the Outerbounds UI or CLI output:

python train_flow.py --environment=fast-bakery run --from-run RayTorchTrain/<YOUR_RUN_ID>

To run an evaluation pipeline from the training run's checkpoint:

python eval_flow.py --environment=fast-bakery evaluate --from-run RayTorchTrain/<YOUR_RUN_ID>

Automate on the product orchestrator

Deploy the training workflow:

python train_flow.py --environment=fast-bakery argo-workflows create

Deploy the evaluation workflow:

python eval_flow.py --environment=fast-bakery argo-workflows create

To trigger the workflow, you can go the Deployments page in the Outerbounds UI and find this workflow. Alternatively, you can run this command:

python train_flow.py --environment=fast-bakery argo-workflows trigger

The evaluation workflow will be triggered automatically after the training workflow completes.