From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mx2.fusionio.com ([64.244.102.31]:52065 "EHLO mx2.fusionio.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1758566Ab1COU45 (ORCPT ); Tue, 15 Mar 2011 16:56:57 -0400 Message-ID: <4D7FD295.6020006@fusionio.com> Date: Tue, 15 Mar 2011 21:56:53 +0100 From: Jens Axboe MIME-Version: 1.0 Subject: Re: memory caching References: ,<4D7FCBDE.2080206@fusionio.com> <8512BC127909424EB483ED236E6AC3C003D6F4@MBX20.d.ethz.ch> In-Reply-To: <8512BC127909424EB483ED236E6AC3C003D6F4@MBX20.d.ethz.ch> Content-Type: text/plain; charset="ISO-8859-1" Content-Transfer-Encoding: 7bit Sender: fio-owner@vger.kernel.org List-Id: fio@vger.kernel.org To: "N. Harake" Cc: "fio@vger.kernel.org" On 2011-03-15 21:54, N. Harake wrote: > > Things improved but maybe too much :), I was expecting a 100K IOPS not more > > server1:~ # fio --name=job --directory=/lvm --size=1G --filesize=1G --iodepth=128 --iodepth_batch_complete=8 --iodepth_batch_submit=8 --ioengine=libaio --direct=1 --numjobs=64 --bs= 4096 --rw=randwrite --group_reporting > Jobs: 50 (f=50): [wwwwww_wwwwwww_wwwwwwwwww_wwwwwwwwwww_www_www_ww_www___ww_w__w_w] [98.3% done] [0K/570.8M /s] [0 /143K iops] [eta 00m:02s] > > write: io=65536MB, bw=584771KB/s, iops=146192 , runt=114761msec If you use numjobs=64, you probably don't want 128 for io depth. Not very realistic, and you'll likely end up running slower than you could. -- Jens Axboe