Yoran Heling
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btrfs-size.pl

2016-08-16 - btrfs-size.pl is a quick little script to provide an overview of the disk space used by btrfs subvolumes. It's comparable to btrfs-size.sh, but is somewhat faster and has a few options to sort the output.

Honestly, it's still hard to draw any conclusions from the sizes provided by btrfs, but sadly, ncdu is useless for snapshot-heavy filesystems.

Only tested with btrfs-progs v4.4.1.

Download: btrfs-size.pl (syntax-highligted version).

Usage

  btrfs-size.pl --help [-nser] <path>
-n Order by path name
-s Order by (total) subvolume size
-e Order by exclusive subvolume size
-r Reverse order

Example output

  # btrfs-size.pl /data
gfbf007/cur 46.32 GiB 16.00 KiB
gfbf007/snap/2016-08-14.08 46.32 GiB 428.00 KiB
gfbf007/snap/2016-08-15.03 46.32 GiB 428.00 KiB
gfbf007/snap/2016-08-16.03 46.32 GiB 16.00 KiB
ggit011/cur 23.92 MiB 16.00 KiB
ggit011/snap/2016-08-14.08 23.90 MiB 300.00 KiB
ggit011/snap/2016-08-15.08 23.92 MiB 16.00 KiB
gman015/cur 3.74 GiB 16.00 KiB
gman015/snap/2016-08-14.08 3.74 GiB 112.00 KiB
gman015/snap/2016-08-15.02 3.74 GiB 96.00 KiB
gman015/snap/2016-08-16.02 3.74 GiB 16.00 KiB