From owner-freebsd-current@FreeBSD.ORG Fri Sep 3 12:18:52 2010 Return-Path: Delivered-To: freebsd-current@freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2001:4f8:fff6::34]) by hub.freebsd.org (Postfix) with ESMTP id 2C6791065702 for ; Fri, 3 Sep 2010 12:18:52 +0000 (UTC) (envelope-from olivier@gid0.org) Received: from mail-iw0-f182.google.com (mail-iw0-f182.google.com [209.85.214.182]) by mx1.freebsd.org (Postfix) with ESMTP id F2A348FC22 for ; Fri, 3 Sep 2010 12:18:51 +0000 (UTC) Received: by iwn34 with SMTP id 34so1714721iwn.13 for ; Fri, 03 Sep 2010 05:18:51 -0700 (PDT) MIME-Version: 1.0 Received: by 10.231.10.134 with SMTP id p6mr211209ibp.50.1283516331275; Fri, 03 Sep 2010 05:18:51 -0700 (PDT) Received: by 10.231.149.8 with HTTP; Fri, 3 Sep 2010 05:18:51 -0700 (PDT) In-Reply-To: <20100903120758.58155gvs7me78e80@webmail.leidinger.net> References: <20100903120758.58155gvs7me78e80@webmail.leidinger.net> Date: Fri, 3 Sep 2010 14:18:51 +0200 Message-ID: From: Olivier Smedts To: Alexander Leidinger Content-Type: text/plain; charset=ISO-8859-1 Content-Transfer-Encoding: quoted-printable Cc: "Jason J. W. Williams" , freebsd-current@freebsd.org Subject: Re: ZFS Cache & Log Device Failure Handling X-BeenThere: freebsd-current@freebsd.org X-Mailman-Version: 2.1.5 Precedence: list List-Id: Discussions about the use of FreeBSD-current List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Fri, 03 Sep 2010 12:18:52 -0000 2010/9/3 Alexander Leidinger : > Quoting "Jason J. W. Williams" (from Thu, 2 S= ep > 2010 13:30:51 -0600): > >> How well does ZFS on FreeBSD handle a dying/wedged log and/or cache >> device? OpenSolaris handles this pretty well in my experience and will >> fail through relatively quickly. But this tends to rely on FMA. Thank >> you in advance. > > No problem for the cache device. I have an USB memory stick as a cache > device, and if I just remove it during operation, the system handles the > situation. If you connect it again, you need to remove/readd it via zfs > commands. I've got the same setup and just have to "online" the usb key after boot. As for the zil/log device, I think it should be supported in the upcoming ZFS v28 patch (maybe you can give it a try, see pjd's mail) because zil removal was introduced in a zpool version after v14/15 (what's in 8-STABLE and 9-CURRENT). > > I do not use a log device. > > Bye, > Alexander. > > -- > Govern a great nation as you would cook a small fish. =A0Don't overdo it. > =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0-- Lao Tsu > > http://www.Leidinger.net =A0 =A0Alexander @ Leidinger.net: PGP ID =3D B00= 63FE7 > http://www.FreeBSD.org =A0 =A0 =A0 netchild @ FreeBSD.org =A0: PGP ID =3D= 72077137 > _______________________________________________ > freebsd-current@freebsd.org mailing list > http://lists.freebsd.org/mailman/listinfo/freebsd-current > To unsubscribe, send any mail to "freebsd-current-unsubscribe@freebsd.org= " > --=20 Olivier Smedts=A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 = =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0=A0 _ =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0= =A0 ASCII ribbon campaign ( ) e-mail: olivier@gid0.org=A0 =A0 =A0 =A0 - against HTML email & vCards=A0 X www: http://www.gid0.org=A0 =A0 - against proprietary attachments / \ =A0 "Il y a seulement 10 sortes de gens dans le monde : =A0 ceux qui comprennent le binaire, =A0 et ceux qui ne le comprennent pas."