median-stop-with-json-format.yaml

---
# This is example with median stopping early stopping rule with logs in JSON format.
# It has bad feasible space for learning rate to show more early stopped Trials.
apiVersion: kubeflow.org/v1beta1
kind: Experiment
metadata:
  namespace: kubeflow
  name: median-stop-with-json-format
spec:
  objective:
    type: maximize
    goal: 0.99
    objectiveMetricName: accuracy
    additionalMetricNames:
      - loss
  metricsCollectorSpec:
    source:
      fileSystemPath:
        path: "/katib/mnist.json"
        kind: File
        format: JSON
    collector:
      kind: File
  algorithm:
    algorithmName: random
  earlyStopping:
    algorithmName: medianstop
    algorithmSettings:
      - name: min_trials_required
        value: "1"
      - name: start_step
        value: "2"
  parallelTrialCount: 2
  maxTrialCount: 15
  maxFailedTrialCount: 3
  parameters:
    - name: lr
      parameterType: double
      feasibleSpace:
        min: "0.01"
        max: "0.5"
    - name: num-epochs
      parameterType: int
      feasibleSpace:
        min: "3"
        max: "4"
  trialTemplate:
    retain: true
    primaryContainerName: training-container
    trialParameters:
      - name: learningRate
        description: Learning rate for the training model
        reference: lr
      - name: numberEpochs
        description: Number of epochs to train the model
        reference: num-epochs
    trialSpec:
      apiVersion: batch/v1
      kind: Job
      spec:
        template:
          spec:
            containers:
              - name: training-container
                image: docker.io/kubeflowkatib/pytorch-mnist-cpu:latest
                command:
                  - "python3"
                  - "/opt/pytorch-mnist/mnist.py"
                  - "--epochs=${trialParameters.numberEpochs}"
                  - "--log-path=/katib/mnist.json"
                  - "--lr=${trialParameters.learningRate}"
                  - "--logger=hypertune"
            restartPolicy: Never