> Btrfs does not suffer from this problem as far as I > can see because it > uses reference counting rather than a ZFS-style dead > list. I was just > wondering if ZFS devs recognize the problem and are > working on a > solution.
Daniel, Correct me if I'm wrong, but how does reference counting solve this problem ? The terminology is as following: 1. Filesystem : A writable "filesystem" with no "references" or a "parent". 2. Snapshot: Immutable point-in-time view of a filesystem 3. Clone: A writable filesystem whose parent is a given snapsho Under this terminology, it is easy to see that dead-list is equivalent to reference counting. The "problem" is rather that to have a clone, you need to have it's snapshot around, since by definition it is a child of a snapshot (with an exception that by using "zfs promote" you can make a clone a direct child of the filesystem, it's like turning a grand-child into a child). So what is the terminology of brtfs ? This message posted from opensolaris.org _______________________________________________ zfs-discuss mailing list zfs-discuss@opensolaris.org http://mail.opensolaris.org/mailman/listinfo/zfs-discuss
