Capture Data - Amazon SageMaker

Capture Data

To use Model Monitor, configure your real-time inference endpoint to capture data from requests and responses and store the captured data in Amazon S3. Model monitor compares metrics from this data with a baseline that you create for the model. For information about creating a baseline, see Create a Baseline.

To set up data capture

  1. First, configure the Amazon S3 buckets Model Monitor uses to store the captured data.

    import boto3 import re import json from sagemaker import get_execution_role, session region= boto3.Session().region_name role = get_execution_role() print("RoleArn: {}".format(role)) # You can use a different bucket, but make sure the role you chose for this notebook # has s3:PutObject permissions. This is the bucket into which the data is captured bucket = session.Session(boto3.Session()).default_bucket() print("Demo Bucket: {}".format(bucket)) prefix = 'sagemaker/DEMO-ModelMonitor' data_capture_prefix = '{}/datacapture'.format(prefix) s3_capture_upload_path = 's3://{}/{}'.format(bucket, data_capture_prefix) reports_prefix = '{}/reports'.format(prefix) s3_report_path = 's3://{}/{}'.format(bucket,reports_prefix) code_prefix = '{}/code'.format(prefix) s3_code_preprocessor_uri = 's3://{}/{}/{}'.format(bucket,code_prefix, '') s3_code_postprocessor_uri = 's3://{}/{}/{}'.format(bucket,code_prefix, '') print("Capture path: {}".format(s3_capture_upload_path)) print("Report path: {}".format(s3_report_path)) print("Preproc Code path: {}".format(s3_code_preprocessor_uri)) print("Postproc Code path: {}".format(s3_code_postprocessor_uri))
  2. Next, upload the pre-trained model to Amazon S3.

    model_file = open("model/your-prediction-model.tar.gz", 'rb') s3_key = os.path.join(prefix, 'your-prediction-model.tar.gz') boto3.Session().resource('s3').Bucket(bucket).Object(s3_key).upload_fileobj(model_file)
  3. Configure the data you want to capture by configuring the data you want to capture in a DataCaptureConfig structure. You can capture the request payload, the response payload, or both with this configuration.

    from sagemaker.model_monitor import DataCaptureConfig endpoint_name = 'your-pred-model-monitor-' + strftime("%Y-%m-%d-%H-%M-%S", gmtime()) print("EndpointName={}".format(endpoint_name)) data_capture_config=DataCaptureConfig( enable_capture = True, sampling_percentage=100, destination_s3_uri=s3_capture_upload_path)
  4. Enable data capture by passing the configuration you created in the previous step when you deploy the model.

    predictor = model.deploy(initial_instance_count=1, instance_type='ml.m4.xlarge', endpoint_name=endpoint_name data_capture_config=data_capture_config)
  5. Invoke the endpoint to send data to the endpoint to get inferences in real time. Because you enabled the data capture in the previous steps, the request and response payload, along with some additional metadata, is saved in the Amazon S3 location that you specified in DataCaptureConfig.

    from sagemaker.predictor import RealTimePredictor import time predictor = RealTimePredictor(endpoint=endpoint_name,content_type='text/csv') # get a subset of test data for a quick test !head -120 test_data/test-dataset-input-cols.csv > test_data/test_sample.csv print("Sending test traffic to the endpoint {}. \nPlease wait...".format(endpoint_name)) with open('test_data/test_sample.csv', 'r') as f: for row in f: payload = row.rstrip('\n') response = predictor.predict(data=payload) time.sleep(0.5) print("Done!")
  6. View captured data by listing the data capture files stored in Amazon S3. Expect to see different files from different time periods, organized based on the hour when the invocation occurred.

    s3_client = boto3.Session().client('s3') current_endpoint_capture_prefix = '{}/{}'.format(data_capture_prefix, endpoint_name) result = s3_client.list_objects(Bucket=bucket, Prefix=current_endpoint_capture_prefix) capture_files = [capture_file.get("Key") for capture_file in result.get('Contents')] print("Found Capture Files:") print("\n ".join(capture_files))

    The format of the Amazon S3 path is as follows: