-------- Original Message --------
Subject: Re: Re-2: verify seems not to take place on iSCSI-Target writing (02-Mrz-2012 19:46)
From: Jens Axboe <axboe@xxxxxxxxx>
To: shu@xxxxxxxxxx
> 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
>
Hi Jens,
then I don't quite understand what sense "verify_async" makes. I thought it'd do the verifies "in parallel".
Any hint's how to get a timebased torture-test with verify working?
Mit freundlichen Grüßen
Stefan Hübner,
OECE - open-e certified engineer
xtivate Service-Team
WWWgroup GbR
Michael Sänger, Jens Walter, Jörg Weißmantel
Ziegelhüttenweg 4
98693 Ilmenau
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To: axboe@xxxxxxxxx
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