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Date:      Sun, 22 Nov 2009 02:51:25 +0300
From:      pluknet <pluknet@gmail.com>
To:        Peter Jeremy <peterjeremy@acm.org>
Cc:        Randy Bush <randy@psg.com>, Johan Hendriks <Johan@double-l.nl>, freebsd-stable@freebsd.org, Jeremy Chadwick <freebsd@jdc.parodius.com>
Subject:   Re: 7.2 dies in zfs
Message-ID:  <a31046fc0911211551v58d7bc16qd7450b11f26e6d2a@mail.gmail.com>
In-Reply-To: <20091121205712.GB35595@server.vk2pj.dyndns.org>
References:  <m2skcajavv.wl%randy@psg.com> <m2r5ruja6v.wl%randy@psg.com> <4B066B13.1070006@freebsd.org> <m2bpiwitz7.wl%randy@psg.com> <4b07ac59.A2Afaf4X0IZlrgGU%perryh@pluto.rain.com> <57200BF94E69E54880C9BB1AF714BBCBA5722E@w2003s01.double-l.local> <20091121193643.GA14122@icarus.home.lan> <20091121205712.GB35595@server.vk2pj.dyndns.org>

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2009/11/21 Peter Jeremy <peterjeremy@acm.org>:
> On 2009-Nov-21 09:47:56 +0900, Randy Bush <randy@psg.com> wrote:
>>imiho, zfs can not be called production ready if it crashes if you do
>>not stand on your left leg, put your right hand in the air, and burn
>>some eye of newt.
>
> FWIW, it's still very brittle on Solaris 10 and the Sun Support
> response to most issues is "restore from backup". =A0The IMHO, the
> biggest issue with ZFS itself is lack of recovery tools prior to PSARC
> 2009/479 (in ZFS v21).
>
> On 2009-Nov-21 11:36:43 -0800, Jeremy Chadwick <freebsd@jdc.parodius.com>=
 wrote:
>>RELENG_7 uses ZFS v13, RELENG_8 uses ZFS v18.
>
> Not in my repository. =A0I still have v13 in
> sys/cddl/contrib/opensolaris/uts/common/sys/fs/zfs.h in last night's
> RELENG_7, RELENG_8 and -current.

The good side of things is that there's the ongoing work on v13 -> v22
in perforce.

>
>>RELENG_7 and RELENG_8 both, more or less, behave the same way with
>>regards to ZFS. =A0Both panic on kmem exhaustion. =A0No one has answered =
my
>>question as far as what's needed to stabilise ZFS on either 7.x or 8.x.
>
> My understanding is that the problem is more that the FreeBSD VM
> system doesn't gracefully handle running low or out of memory.

AFAIU kmacy works on zfs integration into FreeBSD'ish buf/vm.
It'd be nice to read something on that..

--=20
wbr,
pluknet



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