https://bugs.kde.org/show_bug.cgi?id=479107
Bug ID: 479107
Summary: Dolphin does not Copy-on-Write ???? on Btrfs
filesystems
Classification: Applications
Product: dolphin
Version: 23.08.4
Platform: Manjaro
OS: Linux
Status: REPORTED
Severity: task
Priority: NOR
Component: general
Assignee: dolphin-bugs-n...@kde.org
Reporter: landon.carbe...@gmail.com
CC: kfm-de...@kde.org
Target Milestone: ---
SUMMARY
On a copy-on-write filesystem like Btrfs, Dolphin duplicates the entire file(s)
on disk instead of just copying.
STEPS TO REPRODUCE
1. In Dolphin, copy a large directory to another location within the same Btrfs
filesystem.
2. Observe that it's taking an unacceptably long time and a lot of disk space &
throughput. Cancel the operation.
3. In a terminal, use cp to do the same copy operation.
4. Observe that it took all of four seconds, and used negligible extra
diskspace and throughput.
OBSERVED RESULT
Dolphin is wasting time and disk space.
EXPECTED RESULT
A copy-on-write filesystem is actually copy-on-write.
SOFTWARE/OS VERSIONS
Linux Version: 6.6.8-MANJARO (64-bit)
Manjaro Version: 23.1.1
KDE Plasma Version: 5.27.10
KDE Frameworks Version: 5.113.0
Qt Version: 5.15.11
Graphics Platform: X11
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