From: Jeff Johnson <jeff.johnson@aeoncomputing.com>
To: fio@vger.kernel.org
Subject: Re: Strange aggregate BW
Date: Mon, 20 Jan 2014 13:28:01 -0800 [thread overview]
Message-ID: <52DD94E1.2060607@aeoncomputing.com> (raw)
In-Reply-To: <748581DD-9A26-41D7-A537-58F6D6741B33@gmail.com>
What make/model of NL-SAS disk drive? The 4TB/7200RPM drives are pushing
sequential media rates of >150MB/sec.
On 1/20/14, 1:23 PM, grant wrote:
> Hello,
>
> I�ve got a HWRAID with 10 NL-SAS HDDs.
> All of them used in logical volume RAID6.
> I�ve tried to benchmark created volume with FIO v2.1.4:
>
> # cat seqwrite.fio
> [write]
> blocksize=512k
> filename=/dev/sda
> rw=write
> direct=1
> buffered=0
> ioengine=libaio
> iodepth=1
> runtime=10m
> numjobs=16
>
> #./fio seqwrite.fio
>
> FIO returns:
> ...
> Run status group 0 (all jobs):
> WRITE: io=127958MB, aggrb=2132.5MB/s, minb=56530KB/s, maxb=229141KB/s..
>
> 2132 / 10 ~ 200 MB/s per HDD, is that possible???
--
------------------------------
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
next prev parent reply other threads:[~2014-01-20 21:28 UTC|newest]
Thread overview: 6+ messages / expand[flat|nested] mbox.gz Atom feed top
2014-01-20 21:23 Strange aggregate BW grant
2014-01-20 21:28 ` Jeff Johnson [this message]
2014-01-22 20:52 ` grant
2014-01-20 21:29 ` David Nellans
2014-01-20 21:47 ` John Williams
2014-01-22 21:11 ` grant
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