From owner-freebsd-questions@FreeBSD.ORG Sun Sep 28 17:03:00 2008 Return-Path: Delivered-To: freebsd-questions@freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2001:4f8:fff6::34]) by hub.freebsd.org (Postfix) with ESMTP id E427A106568B for ; Sun, 28 Sep 2008 17:03:00 +0000 (UTC) (envelope-from ai_quoc@hotmail.com) Received: from bay0-omc2-s35.bay0.hotmail.com (bay0-omc2-s35.bay0.hotmail.com [65.54.246.171]) by mx1.freebsd.org (Postfix) with ESMTP id C45C08FC17 for ; Sun, 28 Sep 2008 17:03:00 +0000 (UTC) (envelope-from ai_quoc@hotmail.com) Received: from hotmail.com ([64.4.43.16]) by bay0-omc2-s35.bay0.hotmail.com with Microsoft SMTPSVC(6.0.3790.3959); Sun, 28 Sep 2008 10:03:00 -0700 Received: from mail pickup service by hotmail.com with Microsoft SMTPSVC; Sun, 28 Sep 2008 10:03:00 -0700 Message-ID: Received: from 123.20.6.120 by BAY139-DAV6.phx.gbl with DAV; Sun, 28 Sep 2008 17:02:56 +0000 X-Originating-IP: [123.20.6.120] X-Originating-Email: [ai_quoc@hotmail.com] X-Sender: ai_quoc@hotmail.com From: "Danny Do" To: "'Diego F. Arias R.'" , "'Bill Moran'" References: <00d101c92154$691f53c0$3b5dfb40$@com> <48DF78C3.9080401@infracaninophile.co.uk> <20080928165534.X96877@wojtek.tensor.gdynia.pl> <20080928121713.5c905a40.wmoran@potentialtech.com> <3b93bd110809280925i2a99efd7qf733658d7c23fd74@mail.gmail.com> In-Reply-To: <3b93bd110809280925i2a99efd7qf733658d7c23fd74@mail.gmail.com> Date: Mon, 29 Sep 2008 00:01:51 +0700 Message-ID: <015201c9218b$e72df7d0$b589e770$@com> MIME-Version: 1.0 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: quoted-printable X-Mailer: Microsoft Office Outlook 12.0 thread-index: AckhhuUdnuVV4v6XTuyWeKYzd5qFCgAA/wPQ Content-Language: en-au X-OriginalArrivalTime: 28 Sep 2008 17:03:00.0580 (UTC) FILETIME=[10163A40:01C9218C] Cc: 'Wojciech Puchar' , freebsd-questions@freebsd.org Subject: RE: Hard disk bottle neck. X-BeenThere: freebsd-questions@freebsd.org X-Mailman-Version: 2.1.5 Precedence: list List-Id: User questions List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Sun, 28 Sep 2008 17:03:01 -0000 Hi Diego, The reason I use RAID5 because I don't want to waste too much space on = redundancy whilst taking the advantage of read. Over 99% of disk access = are expected to be reading.=20 I could split to 2xRAID5 but I will have difficulty with file management = later. Furthermore, the system would use 2 disks for parity. I don't = want to lose too much space. 300GB@10K SCSI disks are still very = expensive. :( -----Original Message----- From: owner-freebsd-questions@freebsd.org = [mailto:owner-freebsd-questions@freebsd.org] On Behalf Of Diego F. Arias = R. Sent: Sunday, 28 September 2008 11:25 PM To: Bill Moran Cc: Wojciech Puchar; Danny Do; freebsd-questions@freebsd.org Subject: Re: Hard disk bottle neck. On Sun, Sep 28, 2008 at 11:17 AM, Bill Moran = wrote: > Wojciech Puchar wrote: >> >> after you recompile the kernel with that patch, check your disk >> performance in some directory consisting of many large files >> >> cd that_dir >> for x in *;do (cat $x >/dev/null &);done >> >> while running systat,:vmstat on another console > > More specifically, do this before and after you make the change, to > demonstrate whether or not you actually fixed the problem. > > -- > Bill Moran > http://www.potentialtech.com > _______________________________________________ > freebsd-questions@freebsd.org mailing list > http://lists.freebsd.org/mailman/listinfo/freebsd-questions > To unsubscribe, send any mail to = "freebsd-questions-unsubscribe@freebsd.org" > do you check gstat? If the patch dont works, maybe yoy may try to split the raid (2 raid 5) or better use a raid 10. The raid 5 isnt a top performance raid. --=20 mmm, interesante..... _______________________________________________ freebsd-questions@freebsd.org mailing list http://lists.freebsd.org/mailman/listinfo/freebsd-questions To unsubscribe, send any mail to = "freebsd-questions-unsubscribe@freebsd.org"