Andreas Dilger wrote: > I agree, but I suspect large dnodes could also be of use to ZFS at > some point, either for fast EAs and/or small files, so we wanted to > get some buy-in from the ZFS developers on an approach that would > be suitable for ZFS also. In particular, being able to use the larger > dnode space for a variety of reasons (more elements in dn_blkptr[], > small file data, fast EA space) is much more desirable than a Lustre-only > implementation.
Let me give an alternate view here. This could make ZFS Crypto more complex because now data would sometimes be stored inside the dnode. I need to think about this a bit more but in general it makes me uneasy, it may turn out not to be an issue though. See: http://opensolaris.org/os/project/zfs-crypto/phase1/dmu_ot/ for my current plan of what DMU object types get encrypted. -- Darren J Moffat
