On Thu, Oct 11, 2007 at 10:47:44AM +0100, Robert Milkowski wrote: > Hello Matthew, > > Thursday, October 11, 2007, 9:10:13 AM, you wrote: > > MA> Robert Milkowski wrote: > >> I haven't looked into details but in theory one should be > >> able to copy/move a file within the same datapool between datasets > >> without having to actually copy data blocks... or maybe there's some > >> detail which actually makes it hard to implement... > > MA> Once a block is referenced by multiple filesystem, it is nontrivial to > MA> determine when it can be freed. > > In a way multiple snapshots are separate file systems, or clones... > What's the difference? However I'm sure you right...
Snapshot and clones are not autonomous datasets. A clone has always a parent, you can use 'zfs promote' to switch the relatioship, but you cannot make them independent, AFAIK. To Matthew: As I understand it, Robert was talking more about moving the blocks to another dataset, not creating a hardlink-like situation - only one dataset will reference the blocks after the move. -- Pawel Jakub Dawidek http://www.wheel.pl pjd at FreeBSD.org http://www.FreeBSD.org FreeBSD committer Am I Evil? Yes, I Am! -------------- next part -------------- A non-text attachment was scrubbed... Name: not available Type: application/pgp-signature Size: 187 bytes Desc: not available URL: <http://mail.opensolaris.org/pipermail/zfs-code/attachments/20071011/57f54236/attachment.bin>
