On Sat, 26 Nov 2005, Michiel Buddingh' wrote:
> >From that document:
> | "All operations are copy-on-write transactions, so the on-disk state
> | is always valid."
>
> Sounds like another way of saying "log-structured filesystem", and
> ZFS' featureset and performance (notice the high CPU load) seem to
> confirm that.

No, it's not a log structured file system.  See page 11 of
http://www.opensolaris.org/os/community/zfs/docs/zfs_last.pdf for a
diagram showing what they mean by "copy-on-write transactions".

--apb (Alan Barrett)