Fail to delete old backup using prone

I am using this but nothing was deleted neither snapshot or chunks.

You did not specify which snapshots to delete, or which to keep.

What are you tying to accomplish?

Thanks for the reply. I want to delete all snapshots and chunks. The first time I used it, I used the keep function, which deleted snapshots but left one (the most recent). However, the space occupied by the chunks didn’t decrease at all. Therefore, I plan to delete everything and back up again from scratch.

The majority of space being taken by the only first snapshot means your data does not change much over time, and all subsequent snapshots occupy very little space.

Are you planning to backup the same dataset? Then you would end up with pretty much the same chunks, you will just spend time uploading them again.

What I recommend doing instead, if you still want to “start from scratch” but avoid re-uploading bulk of data:

In this order:

  1. create a new backup into a new snapshot ID
  2. perform the first backup. Most of the chunks will skip uploading because they are already present on the storage.
  3. Delete the old snapshot id folder form under snapshots folder directly on the storage (use tools like CyberDuck)
  4. Run prune -a -exhaustive to clean up any orphaned chunks. There won’t be many.

If you want to start absolutely from scratch, and destroy all data, including in other snapshot IDs – delete the whole duplicacy folder from the storage (with chunks, and everything) remove the backup in webUI and start again. But I recommend against it, (unless you want to change some global parameters, like chunking scheme).

Thank you! This explains it.