I'm doing copies from one subvolume to another, through a mounted top level (id5) at /mnt/int.
This copies the whole file conventionally (no shared extents) $ sudo cp /mnt/int/home/chris/Downloads/Fedora-Server-dvd-x86_64-27-1.6.iso /mnt/int/root00/var/lib/libvirt/images/ This is a reflink copy $ sudo cp --reflink /mnt/int/home/chris/Downloads/Fedora-Server-dvd-x86_64-27-1.6.iso /mnt/int/root00/var/lib/libvirt/images/ This is also a refink copy, with the original removed. $ sudo mv /mnt/int/home/chris/Downloads/Fedora-Server-dvd-x86_64-27-1.6.iso /mnt/int/root00/var/lib/libvirt/images/ Seems to me any request to duplicate should be optimized by default with an auto reflink when possible, and require an explicit option to inhibit. -- Chris Murphy -- To unsubscribe from this list: send the line "unsubscribe linux-btrfs" in the body of a message to [email protected] More majordomo info at http://vger.kernel.org/majordomo-info.html
