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Date: Tue, 08 Apr 2014 21:07:41 -0600
From: Jens Axboe <axboe@kernel.dk>
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Subject: Re: bug: fio only uses first file in filename
References: <CAKO35LMpO7_=yGBVpLz7kd2n3YakVWOM8QzV3zWeh4F-_2yYoA@mail.gmail.com>
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To: George Dowding <gdowding@nutanix.com>, fio@vger.kernel.org
List-ID: <fio@vger.kernel.org>

On 2014-04-08 14:04, George Dowding wrote:
> Hi,
>
> I've been using this command with fio-2.0.7. When I tried this with
> fio-201.7 from git, it would only write to the first file in the
> filename list.
>
> ./fio --filename=/dev/sdb:/dev/sdc:/dev/sdd:/dev/sde:/dev/sdf:/dev/sdg
> --direct=1 --rw=randwrite --bs=4k --iodepth=128 --runtime=30
> --group_reporting --name=file1 --ioengine=libaio
>
> Linux perf-bench 3.2.0-23-generic #36-Ubuntu SMP Tue Apr 10 20:39:51
> UTC 2012 x86_64 x86_64 x86_64 GNU/Linux
>
> It looks like this behavior changed as of bcd27f7.
>
> Adding before and after output. If there is a different way this
> should be run. I'm ok with that as I'd like to upgrade to the newer
> version.
>
> fio-68631b36e37.out
> Disk stats (read/write):
>    sdb: ios=83/67975, merge=0/0, ticks=104/607900, in_queue=608016, util=99.78%
>    sdc: ios=83/67976, merge=0/0, ticks=96/616048, in_queue=616152, util=99.75%
>    sdd: ios=74/67975, merge=0/0, ticks=76/629324, in_queue=629420, util=99.76%
>    sde: ios=57/67975, merge=0/0, ticks=64/609128, in_queue=609196, util=99.76%
>    sdf: ios=44/67975, merge=0/0, ticks=48/625372, in_queue=625424, util=99.74%
>    sdg: ios=29/67975, merge=0/0, ticks=48/597756, in_queue=597828, util=99.77%
>
> fio-bcd27f7ae1c.out
> Disk stats (read/write):
>    sdb: ios=73/151552, merge=0/106, ticks=68/3775036, in_queue=3776548,
> util=99.57%
>    sdc: ios=0/0, merge=0/0, ticks=0/0, in_queue=0, util=0.00%
>    sdd: ios=0/0, merge=0/0, ticks=0/0, in_queue=0, util=0.00%
>    sde: ios=0/0, merge=0/0, ticks=0/0, in_queue=0, util=0.00%
>    sdf: ios=0/0, merge=0/0, ticks=0/0, in_queue=0, util=0.00%
>    sdg: ios=0/0, merge=0/0, ticks=0/0, in_queue=0, util=0.00%

Can you try current -git?

-- 
Jens Axboe