Date: Tue, 5 Mar 2013 14:42:25 -0800 From: Jeremy Chadwick <jdc@koitsu.org> To: Freddie Cash <fjwcash@gmail.com> Cc: FreeBSD Stable <freebsd-stable@freebsd.org>, Andriy Gapon <avg@freebsd.org> Subject: Re: ZFS "stalls" -- and maybe we should be talking about defaults? Message-ID: <20130305224225.GA55551@icarus.home.lan> In-Reply-To: <CAOjFWZ7MBU6eqNXgRtv0YryQo7S-%2Bgj9f8FQURncaKnf-Pi2Pw@mail.gmail.com> References: <513524B2.6020600@denninger.net> <89680320E0FA4C0A99D522EA2037CE6E@multiplay.co.uk> <20130305050539.GA52821@anubis.morrow.me.uk> <20130305053249.GA38107@icarus.home.lan> <5135D275.3050500@FreeBSD.org> <20130305220936.GA54718@icarus.home.lan> <CAOjFWZ7MBU6eqNXgRtv0YryQo7S-%2Bgj9f8FQURncaKnf-Pi2Pw@mail.gmail.com>
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On Tue, Mar 05, 2013 at 02:18:30PM -0800, Freddie Cash wrote: > On Tue, Mar 5, 2013 at 2:09 PM, Jeremy Chadwick <jdc@koitsu.org> wrote: > > > On Tue, Mar 05, 2013 at 01:09:41PM +0200, Andriy Gapon wrote: > > > > > > - Disks are GPT and are *partitioned, and ZFS refers to the partitions > > > > not the raw disk -- this matters (honest, it really does; the ZFS > > > > code handles things differently with raw disks) > > > > > > Not on FreeBSD as far I can see. > > > > My statement comes from here (first line in particular): > > > > > > http://lists.freebsd.org/pipermail/freebsd-questions/2013-January/248697.html > > > > If this is wrong/false, then this furthers my point about kernel folks > > who are in-the-know needing to chime in and help stop the > > misinformation. The rest of us are just end-users, often misinformed. > > This has been false from the very first import of ZFS into FreeBSD > 7-STABLE. Pawel even mentions that GEOM allows the use of the cache on > partitions with ZFS somewhere around that time frame. Considering he did > the initial import of ZFS into FreeBSD, I don't think you can find a more > canonical answer. :) > > This is one of the biggest differences between the Solaris-based ZFS and > the FreeBSD-based ZFS. This is good (excellent) information to know -- thank you for clearing that up. > It's too bad this mis-information has basically become a meme. :( Such is the case with FreeBSD's ZFS in general, solely because of the fact that the number of people who can answer the deep technical questions are few. -- | Jeremy Chadwick jdc@koitsu.org | | UNIX Systems Administrator http://jdc.koitsu.org/ | | Mountain View, CA, US | | Making life hard for others since 1977. PGP 4BD6C0CB |
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