From owner-freebsd-fs@FreeBSD.ORG Fri Dec 25 17:08:45 2009 Return-Path: Delivered-To: freebsd-fs@freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2001:4f8:fff6::34]) by hub.freebsd.org (Postfix) with ESMTP id 3D3EB1065670 for ; Fri, 25 Dec 2009 17:08:45 +0000 (UTC) (envelope-from solon@pyro.de) Received: from srv23.fsb.echelon.bnd.org (mail.pyro.de [83.137.99.96]) by mx1.freebsd.org (Postfix) with ESMTP id DC9FA8FC14 for ; Fri, 25 Dec 2009 17:08:44 +0000 (UTC) Received: from port-87-193-183-44.static.qsc.de ([87.193.183.44] helo=MORDOR) by srv23.fsb.echelon.bnd.org with esmtpsa (TLSv1:AES256-SHA:256) (Exim 4.69 (FreeBSD)) (envelope-from ) id 1NODea-0007Q9-OT; Fri, 25 Dec 2009 18:08:44 +0100 Date: Fri, 25 Dec 2009 18:08:21 +0100 From: Solon Lutz X-Mailer: The Bat! (v3.99.25) Professional Organization: pyro.labs berlin X-Priority: 3 (Normal) Message-ID: <168533615.20091225180821@pyro.de> To: Wes Morgan In-Reply-To: References: <568624531.20091215163420@pyro.de> <42952D86-6B4D-49A3-8E4F-7A1A53A954C2@spry.com> <957649379.20091216005253@pyro.de> <26F8D203-A923-47D3-9935-BE4BC6DA09B7@corp.spry.com> <1696529130.20091223212612@pyro.de> <1266543768.20091225120330@pyro.de> <982740779.20091225122331@pyro.de> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Transfer-Encoding: 7bit X-Spam-Score: -1.4 (-) X-Spam-Report: Spam detection software, running on the system "srv23.fsb.echelon.bnd.org", has identified this incoming email as possible spam. The original message has been attached to this so you can view it (if it isn't spam) or label similar future email. If you have any questions, see The administrator of that system for details. Content preview: > I have my suspicions that this means your filesystem is heavily > fragmented. I've had it happen to me on at least 3 pools, some of which > were not even close to full, yet rebuilding the pool restored much of the > performance. Hopefully with the block pointer rewrite support coming we > will get some tools to address this. Right now I am not even aware of a > tool that will check for fragmentation. [...] Content analysis details: (-1.4 points, 5.0 required) pts rule name description ---- ---------------------- -------------------------------------------------- -1.4 ALL_TRUSTED Passed through trusted hosts only via SMTP X-Spam-Flag: NO Cc: freebsd-fs@freebsd.org Subject: Re: ZFS RaidZ2 with 24 drives? X-BeenThere: freebsd-fs@freebsd.org X-Mailman-Version: 2.1.5 Precedence: list List-Id: Filesystems List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Fri, 25 Dec 2009 17:08:45 -0000 > I have my suspicions that this means your filesystem is heavily > fragmented. I've had it happen to me on at least 3 pools, some of which > were not even close to full, yet rebuilding the pool restored much of the > performance. Hopefully with the block pointer rewrite support coming we > will get some tools to address this. Right now I am not even aware of a > tool that will check for fragmentation. Fragmentation is not an issue, as the destination pool was freshly created and the source was created in a continous copy operation... =( Best regards, Solon Lutz +-----------------------------------------------+ | Pyro.Labs Berlin - Creativity for tomorrow | | Wasgenstrasse 75/13 - 14129 Berlin, Germany | | www.pyro.de - phone + 49 - 30 - 48 48 58 58 | | info@pyro.de - fax + 49 - 30 - 80 94 03 52 | +-----------------------------------------------+