Your First dapi Job

One calculation, every dapi step. A 5%-damped oscillator is shaken at its natural frequency, and a single Stampede3 job integrates the motion and reports the dynamic amplification, which lands at the top of the resonance curve near 1/(2*damping) = 10. The point of the pair is the dapi lifecycle itself: authenticate, point Tapis at a folder, generate the job request, submit and monitor, and read the result back from the archive, each as one visible call.

Exercise:

Solution:

The five steps¶

1. Authenticate. DSClient() holds the connection every later call uses.

2. Point Tapis at the folder. ds.files.to_uri on JupyterHub; prepare_inputs uploads from anywhere else.

3. Generate. ds.jobs.generate builds the full request from the app definition; the notebook prints the dict Tapis receives.

4. Submit and monitor. submit, monitor, interpret_status, and the runtime summary showing that a ten-second calculation spends its wall clock on staging and queueing.

5. Read the archive. archive_uri, ds.files.list, and get_output_content bring result.json back, self-checked against the physics.

The same oscillator continues into the PyLauncher sweep, which computes the whole resonance curve inside one job.