Ray Tune copies checkpoint to the same location when running locally

Ray Tune
7

Thanks for raising this and following up. This is indeed a bug, and it should be fixed here: [train/tune] Use posix paths throughout library code by krfricke · Pull Request #38319 · ray-project/ray · GitHub

The fix will be included in Ray 2.7.

As a workaround, you should be able to set the storage_path to a relative directory, which will not trigger the buggy code path:

from ray import air, tune

tuner = tune.Tuner(
    train_fn,
    run_config=air.RunConfig(storage_path="./")
)
tuner.fit()
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