Бекап btrfs

# mount | grep 'on / '
/dev/sda3 on / type btrfs (rw,noatime,ssd,discard,space_cache,subvolid=260,subvol=/root)

# btrfs subvol list -a /
ID 260 gen 39476 top level 5 path <FS_TREE>/root
ID 269 gen 65 top level 5 path <FS_TREE>/storage
ID 270 gen 87 top level 269 path <FS_TREE>/storage/Internal
ID 271 gen 39456 top level 270 path <FS_TREE>/storage/Internal/Synapse
ID 273 gen 39476 top level 270 path <FS_TREE>/storage/Internal/PostgreSQL

# btrfs subvol snap -r / /snap1
Create a readonly snapshot of '/' in '//snap1'

# time ( btrfs send /snap1 | pv -tba | lzop --fast > /mnt/data/Backups/snap1.btrfs-send.lzop )
At subvol /snap1
 6,2GiB 0:02:05 [50,7MiB/s]
( btrfs send /snap1 | pv -ptba | lzop --fast > ; )  26,75s user 66,47s system 73% cpu 2:06,24 total

# pacman -Syu --noconfirm # вывод опущен

# btrfs subvol snap -r / /snap2
Create a readonly snapshot of '/' in '//snap2'

# time ( btrfs send -p /snap1 /snap2 | pv -tba | lzop --fast > /mnt/data/Backups/snap1-to-snap2.btrfs-send.lzop )
At subvol /snap2
 431MiB 0:00:04 [91,9MiB/s]
( btrfs send -p /snap1 /snap2 | pv -tba | lzop --fast > ; )  2,22s user 5,80s system 165% cpu 4,859 total