[frameworks-kio] [Bug 479107] Dolphin does not Copy-on-Write ???? on Btrfs filesystems

[Méven Car]

https://bugs.kde.org/show_bug.cgi?id=479107

Méven Car <meven29 at gmail.com> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
                 CC|                            |meven29 at gmail.com
         Resolution|---                         |WAITINGFORINFO
             Status|REPORTED                    |NEEDSINFO

--- Comment #1 from Méven Car <meven29 at gmail.com> ---
Well we do have "basic" reflink aka copy-on-write support:
https://bugs.kde.org/show_bug.cgi?id=326880

How large is the directory exactly ? How many files, directories, kind of file
size ?
Did you check afterwards using btrfs utility the real space used after the
dolphin copy ?
You said cp was 4 seconds long, how long would dolphin take exactly, 10 times
slower or even more ?

Either you are hitting a real bug with our reflink support not working (which I
find unlikely) or you are hitting a known performance issue we have especially
visible with very large number of small files, we haven't yet full solved :
https://bugs.kde.org/show_bug.cgi?id=342056

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