R - Example Project

In this tutorial, we will create a R machine learning project based on our R example on GitHub.

Create a project

1. Login to app.valohai.com

2. Press Create Project

3. Set a Name for your project, e.g. test-r

4. You can leave Description blank, that is more in detail definition of your project

5. Press the Create button

Link a version control repository

A valid source repository must contain a valohai.yaml configuration file that defines how workers will run your machine learning code. All of our examples have that defined already.

Let’s set up a repository for your project:

1. Go to the example repository page on GitHub:

• https://github.com/valohai/r-example

• If you want to modify the training code, you can fork the repository first.

2. Copy the HTTPS URL of the repository:

• https://github.com/valohai/r-example.git

• Using an SSH URLs work only for private GitHub repositories.

3. Go to the Repository tab inside your new project to set your source repository

4. Paste the URL above to the URL field on the Repository tab

5. Leave Fetch reference as the default value master

6. SSH private key is only required if your Git repository is private

7. Press the Save button

Create an execution

1. Go to the Executions tab inside your project

2. Press the Create execution button

3. The Step field lists all available types of executions. Make sure Metadata example is selected.

4. You don’t need to worry about the rest of the configuration for now. The default inputs and parameters of the form are loaded from the valohai.yaml configuration file and should be good for this example execution.

5. Press Submit to start the execution.

Tip

Valohai command-line client allows creating one-off executions from local files. See Using valohai-cli for more details.

vh exec run --adhoc --watch name-of-your-step
# sends local source code to a worker and runs commands in valohai.yaml

View the results

After you start the execution, you are forwarded to the execution page.

This page has several tabs with execution details:

The Information tab shows the basic information about the execution, most of which could’ve been modified in the previous execution creation step.

The Log tab shows real-time log output from the execution. Anything that your code prints to the standard output (stdout) or standard error (stderr) streams is shown here.

The Metadata tab shows all the metadata output from the execution. You can also plot the metadata on a line chart. Metadata is any data your execution writes to the standard output stream in JSON which we can parse. If no plottable metadata has been output, this tab is not visible.

The Output tab contains download links for all the output artifacts created by the execution. The execution defines these outputs by writing them into /valohai/outputs directory. The artifacts are stored in AWS S3. If the execution has not finished, or did not output any files, this tab will not be visible.

Next steps

Congratulations on running actual machine learning code on the cloud!

For next steps we would encourage reading about the core concepts of Valohai platform to gain a better understanding of all the bells and whistles.