Hi there,
currently iam trying to get deduplication working in debian/btrfs
#so i created a btrfs filesystem
mkfs.btrfs /dev/vdb1
mkdir /mnt/btrfs
mount /dev/vdb1 /mnt/btrfs
# create some random file
dd if=/dev/urandom of=/mnt/btrfs/img bs=1M count=1024
for i in {1..30}; do cp /mnt/btrfs/img /mnt/btrfs/img$i; done
# dedup this stuff
jdupes -S -B -r /mnt/btrfs/
Examining 31 files, 1 dirs (in 1 specified)
Deduplication done (30 files processed)
raps-debian btrfs # btrfs fi df /mnt/btrfs/
Data, single: total=31.50GiB, used=30.96GiB
System, DUP: total=32.00MiB, used=16.00KiB
Metadata, DUP: total=222.94MiB, used=33.69MiB
GlobalReserve, single: total=33.56MiB, used=0.00B
raps-debian btrfs # btrfs fi usage /mnt/btrfs/
Overall:
Device size: 32.00GiB
Device allocated: 32.00GiB
Device unallocated: 1.04MiB
Device missing: 0.00B
Used: 31.03GiB
Free (estimated): 549.41MiB (min: 549.41MiB)
Data ratio: 1.00
Metadata ratio: 2.00
Global reserve: 33.56MiB (used: 0.00B)
Data,single: Size:31.50GiB, Used:30.96GiB
/dev/vdb1 31.50GiB
Metadata,DUP: Size:222.94MiB, Used:33.69MiB
/dev/vdb1 445.88MiB
System,DUP: Size:32.00MiB, Used:16.00KiB
/dev/vdb1 64.00MiB
Unallocated:
/dev/vdb1 1.04MiB
raps-debian btrfs #
hm ... hasn't worked.
wrong tool ? did i missed something
or have i completely misunderstood deduplication?
Greetings
Markus
