From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mail-yh0-f41.google.com ([209.85.213.41]:47855 "EHLO mail-yh0-f41.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752665AbaATV2F (ORCPT ); Mon, 20 Jan 2014 16:28:05 -0500 Received: by mail-yh0-f41.google.com with SMTP id i7so1781820yha.28 for ; Mon, 20 Jan 2014 13:28:03 -0800 (PST) Received: from cloudberry-sbg.aeoncomputing.com ([12.226.163.194]) by mx.google.com with ESMTPSA id a67sm5996591yhj.10.2014.01.20.13.28.02 for (version=TLSv1 cipher=ECDHE-RSA-RC4-SHA bits=128/128); Mon, 20 Jan 2014 13:28:02 -0800 (PST) Message-ID: <52DD94E1.2060607@aeoncomputing.com> Date: Mon, 20 Jan 2014 13:28:01 -0800 From: Jeff Johnson MIME-Version: 1.0 Subject: Re: Strange aggregate BW References: <748581DD-9A26-41D7-A537-58F6D6741B33@gmail.com> In-Reply-To: <748581DD-9A26-41D7-A537-58F6D6741B33@gmail.com> Content-Type: text/plain; charset="windows-1252"; format="flowed" Content-Transfer-Encoding: quoted-printable Sender: fio-owner@vger.kernel.org List-Id: fio@vger.kernel.org To: fio@vger.kernel.org What make/model of NL-SAS disk drive? The 4TB/7200RPM drives are pushing=20 sequential media rates of >150MB/sec. On 1/20/14, 1:23 PM, grant wrote: > Hello, > > I=EF=BF=BDve got a HWRAID with 10 NL-SAS HDDs. > All of them used in logical volume RAID6. > I=EF=BF=BDve tried to benchmark created volume with FIO v2.1.4: > > # cat seqwrite.fio > [write] > blocksize=3D512k > filename=3D/dev/sda > rw=3Dwrite > direct=3D1 > buffered=3D0 > ioengine=3Dlibaio > iodepth=3D1 > runtime=3D10m > numjobs=3D16 > > #./fio seqwrite.fio > > FIO returns: > ... > Run status group 0 (all jobs): > WRITE: io=3D127958MB, aggrb=3D2132.5MB/s, minb=3D56530KB/s, maxb=3D229= 141KB/s.. > > 2132 / 10 ~ 200 MB/s per HDD, is that possible??? --=20 ------------------------------ Jeff Johnson Co-Founder Aeon Computing jeff.johnson "at" aeoncomputing dot com www.aeoncomputing.com t: 858-412-3810 x1001 f: 858-412-3845 4170 Morena Boulevard, Suite D - San Diego, CA 92117 High-performance Computing / Lustre Filesystems / Scale-out Storage