There are *PATENTS* involved. So even reveres engineering things does not solve the problem. Reverse engineered code is still *PATENTED*. You have to write new original code to avoid PATENTS. Who wants to do that????? I would guess, no one on the OBSD team. It's not worth it.
On Fri, Feb 22, 2013, at 03:30 AM, Jeremie Le Hen wrote: > Hi, > > I know that it has been requested to stop bother OpenBSD users with ZFS, > but there are a few not-quite-right things that I want to precise. This > will be my last post on the subject. > > On Thu, Feb 21, 2013 at 08:54:13PM -0500, goodb0fh wrote: > > On Feb 21, 2013, at 6:57 PM, Matthias Appel <appel.matth...@gmail.com> > > wrote: > > . > > > > > > That is what I wanted to say....so if there Is ZFS-a and ZFS-b, why call > > > both of them ZFS? > > Historically there was a single ZFS in OpenSolaris (and Solaris). Other > OSes, esp. FreeBSD, brought it in their code base. Then Oracle closed > the source and put additional features. The other-ZFS that stayed > opensource in illumos and gained additional features as well. So yes > they are incompatible, they have the same name, this is annoying. But I > don't think any of them is more legitimate to be called ZFS. > > I think (hope?) over time, people will prefix "ZFS" with something that > describes the branch unambiguously, like "Oracle ZFS" on one hand and > "OSS ZFS" / "illumos ZFS" on the other. > > > > ZFS has version numbers. They are backward but not forward compatible > > so newer code can mount older ZFS but not the other way round. As > > version increases, capabilities increases, from supporting > > compression, more compression options, dedup and finally, in the > > version in Solaris 11, encryption as well. > > > > All Illumos/opensolaris versions of ZFS do not support ZFS type > > encryption, sadly. > > This was true until Oracle closed the source because there was only one > linear monotonically-increasing version number which clearly identified > which features were available in the pool. > > Oracle basically ignores the other ZFS so they have stayed on the same > track. On the other hand, illumos is well aware that this may be a > problem in the future so, as Bryan Horstmann-Allen explained. That way > there can be multiple ZFS versions, the feature flag will indicate which > feature were supported when the pool was created. > > Regards, > -- > Jeremie Le Hen > > Scientists say the world is made up of Protons, Neutrons and Electrons. > They forgot to mention Morons.
