execute deduplication
#apt install jdupes jdupes --one-file-system --dedupe --recurse --size /storage/
Check deduplication
btrfs filesystem du --summarize --human-readable /storage/
example output
root@server5:~# btrfs filesystem du --summarize --human-readable /storage/
Total Exclusive Set shared Filename
9.56TiB 6.70TiB 1.37TiB /storage/
root@server5:~# df -h /storage
Filesystem Size Used Avail Use% Mounted on
/dev/nvme0n1p1 15T 8.1T 6.5T 56% /storage
mount with compression enabled
root@server5:~# cat /etc/fstab # /etc/fstab: static file system information. # # Use 'blkid' to print the universally unique identifier for a # device; this may be used with UUID= as a more robust way to name devices # that works even if disks are added and removed. See fstab(5). # # <file system> <mount point> <type> <options> <dump> <pass> # / was on /dev/mmcblk0p3 during curtin installation # eMMC Space /dev/disk/by-uuid/04b08549-62d1-41eb-818d-bf301872b67e / ext4 defaults 0 1 /dev/disk/by-uuid/dda5b65e-2cb5-4648-9867-1eaa0e717e2e /boot ext4 defaults 0 1 /dev/disk/by-uuid/F557-B88C /boot/efi vfat defaults 0 1 /swap.img none swap sw 0 0 # NVMe btrfs RAID0 UUID=47679023-51c8-4242-9117-f4b6e76dd3b8 /storage btrfs defaults,compress,autodefrag 0 1
check compression
compsize /storage
root@server5:~# compsize /storage/ Processed 1929919 files, 3560064 regular extents (3764806 refs), 160357 inline. Type Perc Disk Usage Uncompressed Referenced TOTAL 99% 8.0T 8.0T 9.5T none 100% 8.0T 8.0T 9.5T zlib 31% 7.9G 25G 25G prealloc 100% 219M 219M 329M
