Darren, thank you for your reply. While it didn't come out correctly (need to brush up on nomenclature), I did mean snapshot on closure.
Now if what you really mean is snapshot on file closure I think you might well be on to something useful. Whats more NTFS has some cool stuff in this area for consolidating identical files. The hooks that would need to be put into ZFS to do snapshot on file close could be used for other things like single instance storage (though isn't that the opposite of ditto blocks on user data hmn whats the opposite of ditto :-)).
Hmmm, I will try and research what NTFS and others do.
You can also use dtrace to simulate the every single write case and see for yourself the massive explosion of snapshots that would occur as a result.
Yea, this is would be bad. Thank you, will try and see if other filesystems do anything with a closure hook. -- Alex Barclay University of Tulsa Center for Information Security Enterprise Research Group _______________________________________________ zfs-discuss mailing list zfs-discuss@opensolaris.org http://mail.opensolaris.org/mailman/listinfo/zfs-discuss
