XGBoost on Ray tests

This directory contains various XGBoost on Ray release tests.

You should run these tests with the releaser tool.

Overview

There are four kinds of tests:

1. distributed_api_test - checks general API functionality and should finish very quickly (< 1 minute)
2. train_* - checks single trial training on different setups.
3. tune_* - checks multi trial training via Ray Tune.
4. ft_* - checks fault tolerance.

Generally the releaser tool will run all tests in parallel, but if you do it sequentially, be sure to do it in the order above. If train_* fails, tune_* will fail, too.

Acceptance criteria

These tests are considered passing when they throw no error at the end of the output log.