Given a JSON inventory of an Amazon Glacier vault, this will delete all archives. Uses boto3 and joblib libraries for speed.
See Glacier's docs: Deleting an archive using the CLI
pip3 install -r requirements.txt
python delete_archives.py [backup] [archivejson]
python delete_archives.py -h
On my 16 CPU machine a vault of ~135,000 archives took ~30 minutes to delete.
After deleting all of the archives, you need to wait for Glacier to recompute the inventory again :(
S3 Glacier prepares an inventory for each vault periodically, every 24 hours. If there have been no archive additions or deletions to the vault since the last inventory, the inventory date is not updated
https://docs.aws.amazon.com/amazonglacier/latest/dev/working-with-vaults.html
After that you should have an empty inventory and should be able to delete the vault.
See https://docs.aws.amazon.com/amazonglacier/latest/dev/deleting-vaults-cli.html