How to use the checkpointer to save replay buffer in the disk?

[fmxFranky]

I found that there are no files in the directory of the checkpointer's folder, neigther /tmp/xxxxx or the specific predefined directory. I also noticed that the TFCheckpointer class have inferfaces for saving and loading replay buffer, but when i call replay_checkpointer.save() i got the error said "Don't have the attribute 'save' ". So how to use the checkpointer class or reverb's saver class to save replay buffer in the disk? Thanks~

[jmacglashan]

Use client.checkpoint()

Then when you restore, point to the parent directory of the returned directory (using the specific checkpoint doesn't seem to work right now)

[ebrevdo]

(James gave the solution)