[Tune] trial_name_creator and trial_dirname_creator

[yinweisu]

Description

trial_name_creator and trial_dirname_creator are removed from ray tune in 2.0. It would be great if we can have them back.

Use case

Our use case wrap ray tune underneath and we will write artifacts along with ray tune artifacts in the trainable. We would like to write both ray tune and our own artifacts at the same location. With trial_name_creator and trial_dirname_creator, it's easier to do so

[justinvyu]

Hi @yinweisu,

We're looking to add these utilities to the TuneConfig, but I wanted to ask if there were any additional functionality/improvements you would want from this API? Is it possible to share some more details about your use case?

In particular, is it useful to have the flexibility of constructing the name/dirname from the entire Trial object, or would it be clearer to only expose certain Trial attributes such as trainable_name, trial_id, and config? For example: trial_name_creator=lambda trainable_name, trial_id, config: f"{trainable_name}_{trial_id}"?

[yinweisu]

For my use case, the ability to control trial name and trial dirname is enough. Hoewver, as a developer, I would always want more api exposed. Guess it's your choice on what's easier to maintain

[PhilippWillms]

Thanks for enabling that. Especially in case of higher number of parameters to tune, the automatism creates too long filenames for Windows ;)