Date: Wed, 19 Dec 2018 23:10:58 +0000 From: Steven Hartland <killing@multiplay.co.uk> To: Matthew Macy <mmacy@freebsd.org> Cc: freebsd-current <freebsd-current@freebsd.org>, freebsd-fs <freebsd-fs@freebsd.org> Subject: Re: The future of ZFS in FreeBSD Message-ID: <CAHEMsqaJERWM_HpD4ru8Jj6QhVEb_CoOotzH1oPuYa95AoqWeA@mail.gmail.com> In-Reply-To: <CAPrugNpr1YCo%2Br%2BCCts-uEfdU-nOF6-g15eqODJa_nKia_PwWw@mail.gmail.com> References: <CAPrugNriggEMMnLTZtf6xNQNYajBYNMnGdN96-ejDYQonoOhgw@mail.gmail.com> <CAHEMsqbhdcy1GKznVhxKAqCabYHvm_G9oxQR6eQrJ372215E0w@mail.gmail.com> <CAPrugNpr1YCo%2Br%2BCCts-uEfdU-nOF6-g15eqODJa_nKia_PwWw@mail.gmail.com>
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Sorry been off for a few weeks so must have missed that, please do prod me on again if you don=E2=80=99t see any response to anything not just this. L= ike many others I get so may emails across so many lists it=E2=80=99s more than like= ly I just missed it. That said would you say that with the right support we can make progress on the this prior to the port? I have to ask as the alternative version has been on the cusp for many years now so it=E2=80=99s feels more like a dista= nt memory than something that may happen, no disrespect to anyone involved, as I know all too well how hard it can be to get something like this over the line, especially when people have competing priorities. On Wed, 19 Dec 2018 at 22:52, Matthew Macy <mmacy@freebsd.org> wrote: > > > On Wed, Dec 19, 2018 at 14:47 Steven Hartland <killing@multiplay.co.uk> > wrote: > >> Thanks for the write up most appreciated. One of the more meaty >> differences is that FreeBSD ZFS still has the only merged and production >> ready TRIM support so my question would be are their any plans to addres= s >> this before creating the new port as going back to a world without TRIM >> support wouldn=E2=80=99t be something I=E2=80=99d look forward to. >> > > Well, then please follow up on the request I CC'd you on a week ago askin= g > that you engage on the deadlist based TRIM PR. That's a better forum for > discussing these details than lamenting in public lists. > > Thanks. > > -M > > > > >> On Wed, 19 Dec 2018 at 06:51, Matthew Macy <mmacy@freebsd.org> wrote: >> >>> The sources for FreeBSD's ZFS support are currently taken directly >>> from Illumos with local ifdefs to support the peculiarities of FreeBSD >>> where the Solaris Portability Layer (SPL) shims fall short. FreeBSD >>> has regularly pulled changes from Illumos and tried to push back any >>> bug fixes and new features done in the context of FreeBSD. In the past >>> few years the vast majority of new development in ZFS has taken place >>> in DelphixOS and zfsonlinux (ZoL). Earlier this year Delphix announced >>> that they will be moving to ZoL >>> https://www.delphix.com/blog/kickoff-future-eko-2018 This shift means >>> that there will be little to no net new development of Illumos. While >>> working through the git history of ZoL I have also discovered that >>> many races and locking bugs have been fixed in ZoL and never made it >>> back to Illumos and thus FreeBSD. This state of affairs has led to a >>> general agreement among the stakeholders that I have spoken to that it >>> makes sense to rebase FreeBSD's ZFS on ZoL. Brian Behlendorf >>> has graciously encouraged me to add FreeBSD support directly to ZoL >>> https://github.com/zfsonfreebsd/ZoF so that we might all have a single >>> shared code base. >>> >>> A port for ZoF can be found at https://github.com/miwi-fbsd/zof-port >>> Before it can be committed some additional functionality needs to be >>> added to the FreeBSD opencrypto framework. These can be found at >>> https://reviews.freebsd.org/D18520 >>> >>> This port will provide FreeBSD users with multi modifier protection, >>> project quotas, encrypted datasets, allocation classes, vectorized >>> raidz, vectorized checksums, and various command line improvements. >>> >>> Before ZoF can be merged back in to ZoL several steps need to be taken: >>> - Integrate FreeBSD support into ZoL CI >>> - Have most of the ZFS test suite passing >>> - Complete additional QA testing at iX >>> >>> We at iX Systems need to port ZoL's EC2 CI scripts to work with >>> FreeBSD and make sure that most of the ZFS Test Suite (ZTS) passes. >>> Being integrated in to their CI will mean that, among other things, >>> most integration issues will be caught before a PR is merged upstream >>> rather than many months later when it is MFVed into FreeBSD. I=E2=80=99= m >>> hoping to submit the PR to ZoL some time in January. >>> >>> This port will make it easy for end users on a range of releases to >>> run the latest version of ZFS. Nonetheless, transitioning away from an >>> Illumos based ZFS is not likely to be entirely seamless. The >>> stakeholders I=E2=80=99ve spoken to all agree that this is the best pat= h >>> forward but some degree of effort needs to be made to accommodate >>> downstream consumers. The current plan is to import ZoF and unhook the >>> older Illumos based sources from the build on April 15th or two months >>> after iX systems QA deems ZoF stable - which ever comes later. The >>> Illumos based sources will be removed some time later - but well >>> before 13. This will give users a 3 month period during which both the >>> port and legacy Illumos based ZFS will be available to users. Pools >>> should interoperate between ZoF and legacy provided the user does not >>> enable any features available only in ZoF. We will try to accommodate >>> any downstream consumers in the event that they need that date pushed >>> back. We ask that any downstream consumers who are particularly >>> sensitive to changes start testing the port when it is formally >>> announced and report back any issues they have. I will do my best to >>> ensure that this message is communicated to all those who it may >>> concern. However, I can=E2=80=99t ensure that everyone reads these list= s. That >>> is the responsibility of -CURRENT users. >>> >>> -M >>> >> _______________________________________________ >>> freebsd-fs@freebsd.org mailing list >>> https://lists.freebsd.org/mailman/listinfo/freebsd-fs >>> To unsubscribe, send any mail to "freebsd-fs-unsubscribe@freebsd.org" >>> >>
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