Received: with ECARTIS (v1.0.0; list xfs); Tue, 13 Feb 2007 04:36:28 -0800 (PST) X-Spam-oss-Status: No, score=0.4 required=5.0 tests=AWL,BAYES_50, J_CHICKENPOX_24 autolearn=no version=3.2.0-pre1-r497472 Received: from mail.edu.haifa.ac.il (mail.edu.haifa.ac.il [132.74.40.10]) by oss.sgi.com (8.12.10/8.12.10/SuSE Linux 0.7) with ESMTP id l1DCaKm7025812 for ; Tue, 13 Feb 2007 04:36:21 -0800 Received: from localhost (localhost [127.0.0.1]) by mail.edu.haifa.ac.il (Postfix) with ESMTP id D840E12C1A5; Tue, 13 Feb 2007 14:40:40 +0200 (IST) Received: from mail.edu.haifa.ac.il ([127.0.0.1]) by localhost (mail.edu.haifa.ac.il [127.0.0.1]) (amavisd-new, port 10026) with ESMTP id AwcC3dQK0KfH; Tue, 13 Feb 2007 14:40:40 +0200 (IST) Received: from kozanostra (leon.edu.haifa.ac.il [132.74.41.33]) (using TLSv1 with cipher RC4-MD5 (128/128 bits)) (No client certificate requested) by mail.edu.haifa.ac.il (Postfix) with ESMTP id 9987D1F909; Tue, 13 Feb 2007 14:40:40 +0200 (IST) From: "Leon Kolchinsky" To: "'Olaf Fr?czyk'" Cc: "'Justin Piszcz'" , Subject: RE: mkfs and mount tips? Date: Tue, 13 Feb 2007 14:38:18 +0200 MIME-Version: 1.0 Content-Type: text/plain; charset="windows-1255" X-Mailer: Microsoft Office Outlook, Build 11.0.5510 Thread-Index: AcdPZYVMxDw6Ti2ORxGpez3pvDP+SwABcOAQ X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2900.3028 In-Reply-To: <1171365268.20354.31.camel@venus.local.navi.pl> Message-Id: <20070213124040.9987D1F909@mail.edu.haifa.ac.il> Content-Transfer-Encoding: 8bit X-MIME-Autoconverted: from quoted-printable to 8bit by oss.sgi.com id l1DCaLm7025818 X-archive-position: 10642 X-ecartis-version: Ecartis v1.0.0 Sender: xfs-bounce@oss.sgi.com Errors-to: xfs-bounce@oss.sgi.com X-original-sender: leonk@construct.haifa.ac.il Precedence: bulk X-list: xfs Content-Length: 985 Lines: 41 > (...) > > > When I was trying out different optimizations (and what I currently > use on > > > a couple volumes is): > > > > > > logbufs=8,logbsize=262144,biosize=16,noatime,nodiratime,nobarrier > > > > > > > I think that "nobarrier" option is bad, cause power failure would > corrupt > > your FS in this case. > It depends on hardware. If you use SCSI with write cache turned off I > see no reason to loss data. You might use RAID with write cache (battery > powered) safely too. > I'm not sure but even (S)ATA with write cache disabled should be fine. > Thanks for the tips. 1) Is "–d unwritten=0" option is pretty safe? 2) What's the recommended value of "-d agcount=" for?: 10GB disk for web/mail/streaming server accordingly 50GB disk for web/mail/streaming server accordingly 300GB disk for web/mail/streaming server accordingly Or how can I calculate these recommended values? > Regards, > > Olaf > -- > Olaf Fr?czyk Regards, Leon Kolchinsky