Date: Tue, 26 May 2009 21:38:42 -0700 From: Kip Macy <kmacy@freebsd.org> To: Kai Gallasch <gallasch@free.de> Cc: freebsd-fs@freebsd.org Subject: Re: RFT: ZFS MFC Message-ID: <3c1674c90905262138p7b196bc7ga2febb4667778e22@mail.gmail.com> In-Reply-To: <4A1C1E15.3080300@free.de> References: <3c1674c90905151628h183cb1c2t8941843f8a828d4f@mail.gmail.com> <4A1C1E15.3080300@free.de>
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On Tue, May 26, 2009 at 9:51 AM, Kai Gallasch <gallasch@free.de> wrote: > Kip Macy wrote: >> I've MFC'd ZFS v13 to RELENG_7 in a work branch. Please test if you can. >> >> http://svn.freebsd.org/base/user/kmacy/ZFS_MFC/ >> >> The standard disclaimers apply. This has only been lightly tested in a >> VM. Please do not use it with data you care about at this time. >> > > Hi. > > http://www.freebsd.org/cgi/cvsweb.cgi/src/sys/cddl/contrib/opensolaris/common/zfs/zfs_prop.c > > So ZFS v13 is now part of RELENG_7 MAIN. > Did you receive any negative feedback until now? > > zpool upgrade: > Should a ZFS v6 pool be upgraded through 'zpool upgrade' while in use? > > loader.conf: > My old loader.conf (7.2-STABLE-amd64) settings for zfs: > > vm.kmem_size="3072M" > vm.kmem_size_max="3072M" > vfs.zfs.arc_min="120795878" > vfs.zfs.arc_max="2899101078" > # more stability? > vfs.zfs.prefetch_disable=1 > > Is there a need to keep the old (painfully found :) known to work > settings when upgrading from ZFS v6 to v13 on RELENG_7, because in your > commit message I read: "- the arc now experiences backpressure from the > vm (which can be too much - but this allows ZFS to work without any > tunables on amd64)" > Machines with less than 4GB, especially those with workloads with poor locality, should have prefetch disabled. You should not need the other tunables on amd64 (i386 is both a lower priority and a harder problem). When reporting problems report them with the tunables removed as well as whatever your existing tunables are. -Kip
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