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Top-level
Portage uses If XFS (or another "good" backing fs is used), it can take advantage of it for you. We've found a bunch of bugs over the years through this, in various filesystems, actually! Take a look at https://wiki.gentoo.org/wiki/User:Sam/Memorable_bugs_I_like_to_reference for a list. 7 comments
Fortunately, other libraries are starting to allow transparent use! Jannik Glückert recently implemented support in libstdc++ [0][1] which will arrive in GCC 14. [0] https://gcc.gnu.org/git/?p=gcc.git;a=commit;h=f80a8b42296265bb868a48592a2bd1fdaa2a3d8a glib will do the same in EDIT: I forgot to mention, KDE's kio handles it too. So, together, the respective KDE and GNOME file managers and such should be fine. And last but in no way least, GNU coreutils 9.0 defaults to Let me know if there's other software out there which supports this transparently. Reflinks aren't particularly new, and nor is Check the guts of your favourite libraries, you might be surprised! Bonus: I should say, zfs doesn't yet support this in a release on Linux, surprisingly. Support was recently added on master in https://github.com/openzfs/zfs/pull/13392 but only for FreeBSD. I believe Linux support is in the works. Bonus2: Portage |
Gregory's Server
Unfortunately, Python itself doesn't automagically do this yet:
- https://github.com/python/cpython/issues/81338
- https://github.com/python/cpython/issues/81340
But you can see how we handle it at https://github.com/gentoo/portage/blob/22e027aef2ddb49d1c4e2423b5b1f3c209ac8efe/src/portage_util_file_copy_reflink_linux.c if interested.