From owner-freebsd-current@FreeBSD.ORG Fri Sep 3 10:08:11 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 80B8F106581C for ; Fri, 3 Sep 2010 10:08:11 +0000 (UTC) (envelope-from alexander@leidinger.net) Received: from mail.ebusiness-leidinger.de (mail.ebusiness-leidinger.de [217.11.53.44]) by mx1.freebsd.org (Postfix) with ESMTP id 2BC9B8FC16 for ; Fri, 3 Sep 2010 10:08:10 +0000 (UTC) Received: from outgoing.leidinger.net (p57B3A54A.dip.t-dialin.net [87.179.165.74]) by mail.ebusiness-leidinger.de (Postfix) with ESMTPSA id 81183844042; Fri, 3 Sep 2010 12:08:02 +0200 (CEST) Received: from webmail.leidinger.net (webmail.leidinger.net [192.168.1.102]) by outgoing.leidinger.net (Postfix) with ESMTP id 3ACC711B2; Fri, 3 Sep 2010 12:07:59 +0200 (CEST) DKIM-Signature: v=1; a=rsa-sha256; c=simple/simple; d=Leidinger.net; s=outgoing-alex; t=1283508479; bh=GvGxNhpUDp58m72vI4PLfei89MbldVXDvPDUe1F3sJU=; h=Message-ID:Date:From:To:Cc:Subject:References:In-Reply-To: MIME-Version:Content-Type:Content-Transfer-Encoding; b=Cew/WUigsYIT5anaI9yJ6ixdwkZQQX4GtwCkDtVeesB2/qwUhT6RlH/OBw8ZzSxYK h6eytzXdJ+ryTJ9GLcG3/LqJO+XP65xuJp2wMXZeVcLGhZCwUIDK04aQTEhFjsDOwD z1t9MvIZRDPu3X3fGVEEUjUKHfxuFCTWJcIbm6s7pdNhFbpwuExK21MYQGgmRyVGL6 hMt36BcVu121BNhm3YIGK3RjThbJc0OEeQtmQsfc+1lI34R2aS5fnFsfeJt6OPyEQW x0n7MXhilRzdNIcq3wrpHX1MAtYq5g0ms6okil8FB8+MtC9DapHrqG++jORyuYlpS5 pBPAAdZmsFAuw== Received: (from www@localhost) by webmail.leidinger.net (8.14.4/8.13.8/Submit) id o83A7wg2039353; Fri, 3 Sep 2010 12:07:58 +0200 (CEST) (envelope-from Alexander@Leidinger.net) Received: from psbru.ec.europa.eu (psbru.ec.europa.eu [158.169.131.14]) by webmail.leidinger.net (Horde Framework) with HTTP; Fri, 03 Sep 2010 12:07:58 +0200 Message-ID: <20100903120758.58155gvs7me78e80@webmail.leidinger.net> Date: Fri, 03 Sep 2010 12:07:58 +0200 From: Alexander Leidinger To: "Jason J. W. Williams" References: In-Reply-To: MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8; DelSp="Yes"; format="flowed" Content-Disposition: inline Content-Transfer-Encoding: 7bit User-Agent: Dynamic Internet Messaging Program (DIMP) H3 (1.1.4) X-EBL-MailScanner-Information: Please contact the ISP for more information X-EBL-MailScanner-ID: 81183844042.A4937 X-EBL-MailScanner: Found to be clean X-EBL-MailScanner-SpamCheck: not spam, spamhaus-ZEN, SpamAssassin (not cached, score=-1.023, required 6, autolearn=disabled, ALL_TRUSTED -1.00, DKIM_SIGNED 0.10, DKIM_VALID -0.10, DKIM_VALID_AU -0.10, TW_ZF 0.08) X-EBL-MailScanner-From: alexander@leidinger.net X-EBL-MailScanner-Watermark: 1284113283.52104@ds17dBYJH2QiYgklyv/zsg X-EBL-Spam-Status: No Cc: 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 10:08:11 -0000 Quoting "Jason J. W. Williams" (from Thu, 2 Sep 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 do not use a log device. Bye, Alexander. -- Govern a great nation as you would cook a small fish. Don't overdo it. -- Lao Tsu http://www.Leidinger.net Alexander @ Leidinger.net: PGP ID = B0063FE7 http://www.FreeBSD.org netchild @ FreeBSD.org : PGP ID = 72077137