From: "Jérôme Poulin" <jeromepoulin@gmail.com>
To: Roberto Spadim <roberto@spadim.com.br>
Cc: Linux-RAID <linux-raid@vger.kernel.org>
Subject: Re: raid1 sector size
Date: Sun, 6 Feb 2011 13:03:59 -0500 [thread overview]
Message-ID: <AANLkTi=jGzLZ6w6eijB6qD+LLNmjYE-NiceTuv7bw9v8@mail.gmail.com> (raw)
In-Reply-To: <AANLkTinwowg1evk44=46VO+Eni1B=G5Mr_X1r32GO5eF@mail.gmail.com>
On Sun, Feb 6, 2011 at 11:49 AM, Roberto Spadim <roberto@spadim.com.br> wrote:
> the problem (benchmark) i don't know if it's a cpu intensive use
> that's blocking some i/o (try to reduce IOPS on md raid1), or a
> problem at read logic (check if disk is ok)
>
> [root@myhost block]# dd if=/dev/sda of=/dev/zero bs=8196
> ^C80106+0 registros de entrada
> 80105+0 registros de saída
> 656540580 bytes (657 MB) copiados, 5,38142 s, 122 MB/s
>
> [root@myhost block]# dd if=/dev/md0 of=/dev/zero bs=8196
> ^C52851+0 registros de entrada
> 52850+0 registros de saída
> 433158600 bytes (433 MB) copiados, 10,4623 s, 41,4 MB/s
>
You could try with some computer friendly bs= value, like 8192.
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next prev parent reply other threads:[~2011-02-06 18:03 UTC|newest]
Thread overview: 17+ messages / expand[flat|nested] mbox.gz Atom feed top
2011-02-06 16:19 raid1 sector size Roberto Spadim
2011-02-06 16:49 ` Roberto Spadim
2011-02-06 18:03 ` Jérôme Poulin [this message]
2011-02-06 22:30 ` Stan Hoeppner
2011-02-07 1:21 ` Roberto Spadim
2011-02-07 23:44 ` Periodic RebuildStarted event Martin Cracauer
2011-02-07 23:52 ` Roberto Spadim
2011-02-07 23:59 ` Martin Cracauer
2011-02-08 0:28 ` Roberto Spadim
2011-02-08 0:25 ` NeilBrown
2011-03-15 3:16 ` CoolCold
2011-03-15 3:28 ` Roberto Spadim
2011-03-15 3:51 ` CoolCold
2011-03-15 4:16 ` Roberto Spadim
2011-03-15 3:41 ` NeilBrown
2011-03-15 4:21 ` CoolCold
2011-03-15 6:17 ` NeilBrown
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