Tensorboard: Tensorboard.dev upload to specified experiment ID

[gzerveas]

Currently, there is no way to upload new data to an existing experiment once the tensorboard client has been interrupted. However, this use case comes up very often (e.g. running a bunch of hyperparameter search experiments, then another bunch, or implementing a new model a few days later and wanting to compare). The only solution is to delete the older experiment and start a new experiment, assuming that the data exist on the same machine. This brings us to the second benefit: in case one is performing experiments on different machines, it is a lot more convenient to upload all to the same URL/experiment ID, than to aggregate the data (or mount the remote drives) on a single machine and then upload them to an experiment.
The proposed functionality would be evoked like this:
tensorboard dev update --experiment_id EXPERIMENT_ID --logdir logs

[bileschi]

Thank you for your feature request @gzerveas, this is a request we have heard from several users, and something we will prioritize.

[kryptonite0]

up this, would be really cool to have this functionality