From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from casper.infradead.org ([85.118.1.10]:51350 "EHLO casper.infradead.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1754539Ab2CBSqW (ORCPT ); Fri, 2 Mar 2012 13:46:22 -0500 Message-ID: <4F51157B.4020509@kernel.dk> Date: Fri, 02 Mar 2012 19:46:19 +0100 From: Jens Axboe MIME-Version: 1.0 Subject: Re: Re-2: verify seems not to take place on iSCSI-Target writing References: In-Reply-To: Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: 8bit Sender: fio-owner@vger.kernel.org List-Id: fio@vger.kernel.org To: =?UTF-8?B?U3RlZmFuIEjDvGJuZXI=?= Cc: fio@vger.kernel.org On 2012-03-02 18:06, Stefan Hübner wrote: > Dear Jens, > > this is the output. I added some supplementary details in the hope it's useful ... > > UltraBitch ~ # ISCSI_DEVICE=/dev/sdb SECONDS=$((20*3600)) fio iscsi-stress.fio > iSCSI: (g=0): rw=randwrite, bs=4K-4M/4K-4M, ioengine=libaio, iodepth=16 > fio 2.0.3 > Starting 1 process > Jobs: 1 (f=1): [w] [17.3% done] [0K/113.2M /s] [0 /71 iops] [eta 03d:23h:28m:21s] > iSCSI: (groupid=0, jobs=1): err= 0: pid=18184 > write: io=7740.2GB, bw=112723KB/s, iops=63 , runt=72000222msec > bw (KB/s) : min= 3669, max=593424, per=100.00%, avg=113561.25, stdev=26868.27 > cpu : usr=4.18%, sys=1.28%, ctx=4760480, majf=0, minf=106912 > IO depths : 1=0.1%, 2=0.1%, 4=0.1%, 8=0.1%, 16=100.0%, 32=0.0%, >=64=0.0% > submit : 0=0.0%, 4=100.0%, 8=0.0%, 16=0.0%, 32=0.0%, 64=0.0%, >=64=0.0% > complete : 0=0.0%, 4=100.0%, 8=0.0%, 16=0.1%, 32=0.0%, 64=0.0%, >=64=0.0% > issued : total=r=0/w=4560578/d=0, short=r=0/w=0/d=0 > > Run status group 0 (all jobs): > WRITE: io=7740.2GB, aggrb=112723KB/s, minb=115428KB/s, maxb=115428KB/s, mint=72000222msec, maxt=72000222msec No reads happened - quick guess, you had the timeout hit before the write phase has finished. Hence it'll exit, and don't do verifies. The reads you saw in the stats must be from other processes. Fio didn't do any. -- Jens Axboe