On Tue, Oct 13, 2020 at 7:38 PM Chris Murphy <lists@xxxxxxxxxxxxxxxxx> wrote: > > Hi, > > I'm looking for testers: > - Fedora 33 > - User home is on Btrfs (clean installed or converted, in a subvolume > or not, these details won't matter) > - using any spin other than Workstation (kde, lxqt, xfce, etc are all > requested). I'd like to know which desktops do/don't automagically > support reflink copies. What are reflinks? See Note 1 below. > > > 1. Use the file manager to duplicate a file anywhere within user home, You might check the file with filefrag before going further, to make sure it isn't already shared. Reflinks, dedup, and snapshots will result in shared extents. Alternatively just fallocate a file, e.g. $ fallocate -l 10m testfile $ filefrag -v testfile Filesystem type is: 9123683e File size of testfile is 10485760 (2560 blocks of 4096 bytes) ext: logical_offset: physical_offset: length: expected: flags: 0: 0.. 2559: 19099880.. 19102439: 2560: last,unwritten,eof testfile: 1 extent found $ cp testfile testfile2 $ filefrag -v testfile Filesystem type is: 9123683e File size of testfile is 10485760 (2560 blocks of 4096 bytes) ext: logical_offset: physical_offset: length: expected: flags: 0: 0.. 2559: 19099880.. 19102439: 2560: last,unwritten,shared,eof testfile: 1 extent found $ filefrag -v testfile2 Filesystem type is: 9123683e File size of testfile2 is 10485760 (2560 blocks of 4096 bytes) ext: logical_offset: physical_offset: length: expected: flags: 0: 0.. 2559: 19099880.. 19102439: 2560: last,unwritten,shared,eof testfile2: 1 extent found $ Of course, you're substituting a GUI file manager method of copying rather than using 'cp' -- Chris Murphy _______________________________________________ test mailing list -- test@xxxxxxxxxxxxxxxxxxxxxxx To unsubscribe send an email to test-leave@xxxxxxxxxxxxxxxxxxxxxxx Fedora Code of Conduct: https://docs.fedoraproject.org/en-US/project/code-of-conduct/ List Guidelines: https://fedoraproject.org/wiki/Mailing_list_guidelines List Archives: https://lists.fedoraproject.org/archives/list/test@xxxxxxxxxxxxxxxxxxxxxxx
