Compression

[ben-auo]

Are the S3 backups compressed by default? If so, which compression method?

[theotow]

Right now there is no way to compress backups.
It should be possible to add a compression stage similar to the encryption stage https://zfs-backup-blob.top/configuration/stages/.

[ben-auo]

I see, thanks. Hopefully it can be added in the future because many backups contain large amounts of empty space, significantly increasing time and cost for storage.