When copying files into a chunker backend, it will create a chunk files ending in XXXX.rclone_chunk.YYY_ZZZZ. If the copy fails after a few chunks have sent and the copy is started again, rclone chooses a new random ZZZZ prefix. Can't a prefix be obtained from the an md5 of the filename (not the data within the file) and taking the first few or last characters? This could be used in tandem with resuming copies after they fail because of API limits etc
We have two pull requests claiming to implement resumable uploads in particular for chunker. Both are waiting for review.
Ah I see it here chunker: implement Resumer interface by mcalman · Pull Request #5185 · rclone/rclone · GitHub thank you.