> To make use of snapshots, the backup drive gotta be Btrfs as well. The compression level was turned up to 14 this time (default was 3): Isn't this useless? M

> To make use of snapshots, the backup drive gotta be Btrfs as well. The compression level was turned up to 14 this time (default was 3): Isn't this useless? My understanding is that compression is only done at file write time. When you "btrfs send" a snapshot, the data is streamed over without recompression, so there's no point in setting up a higher compression level in the backup disk.