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Setup
test done on Synology DS-220+ 7.2.2 (geminilake)
SHR 2x18TB HDD (RAID114:00 -)
how to get jdupes on Synology
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root@storage:~# grep -e product_version -e platform_name /etc/synoinfo.conf platform_name="geminilake" last_show_upgrade_mask_in_login_product_version="7.2.2" |
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State before deduplication
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root@storage:~# df -h /volume1
Filesystem Size Used Avail Use% Mounted on
/dev/vg1000/lv 16T 12T 4.1T 75% /volume1
root@storage:~# mount |grep /volume1
/dev/mapper/vg1000-lv on /volume1 type btrfs (rw,nodev,relatime,ssd,synoacl,nospace_cache,auto_reclaim_space,metadata_ratio=50,syno_allocator,subvolid=257,subvol=/@syno)
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execute
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deduplicate of backup folder
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root@storage:~# jdupes --one-file-system --dedupe --recurse --size /volume1/backup/ Scanning: 761995 files, 109877 items (in 2 specified) Progress [138877/761995, 32742 pairs matched] 18% ... |
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root@storage:~# btrfs filesystem du --summarize --human-readable /volume1/backup/
Total Exclusive Set shared Filename
1.58TiB 995.21GiB 293.23GiB /volume1/backup/
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deduplicate shared folder
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root@storage:~# jdupes --one-file-system --dedupe --recurse --size /volume1/backup/ |
took about 55 hours
add about 2.6TB of free space
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root@storage:~# df -h /volume1 Filesystem Size Used Avail Use% Mounted on /dev/vg1000/lv 16T 8.7T 7.1T 56% /volume1 |
So total free space gain is 3TB (from 12TB used) and 62 hours of duduplication run