From: Wolfgang Denk <wd@denx.de>
To: Roberto Spadim <roberto@spadim.com.br>
Cc: stefan.huebner@stud.tu-ilmenau.de, linux-raid@vger.kernel.org
Subject: Re: Optimize RAID0 for max IOPS?
Date: Wed, 19 Jan 2011 08:11:38 +0100 [thread overview]
Message-ID: <20110119071138.7B2D02FC@gemini.denx.de> (raw)
In-Reply-To: <AANLkTi=v6yA_0OOfi2ymA67X0x+KsvV9VC5OgG+0DvKq@mail.gmail.com>
Dear Roberto Spadim,
In message <AANLkTi=v6yA_0OOfi2ymA67X0x+KsvV9VC5OgG+0DvKq@mail.gmail.com> you wrote:
> maybe removing hwraid and using swraid may reduce speed (depend how
> much cpu you use with hw and with sw)
> what we can optimize? less I/O per seconds making as much useful
> read/write data on array, how? good read/write algorithms for raid.
> (for each device type, ssd, hd) but... like stefan, disks are your
> bottleneck
No, they are not. Run some benchmarks yourself if you don't believe
me.
Even a single disk drive is performing better than the hw RAID under
this workload.
Best regards,
Wolfgang Denk
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next prev parent reply other threads:[~2011-01-19 7:11 UTC|newest]
Thread overview: 46+ messages / expand[flat|nested] mbox.gz Atom feed top
2011-01-18 21:01 Optimize RAID0 for max IOPS? Wolfgang Denk
2011-01-18 22:18 ` Roberto Spadim
2011-01-19 7:04 ` Wolfgang Denk
2011-01-18 23:15 ` Stefan /*St0fF*/ Hübner
2011-01-19 0:05 ` Roberto Spadim
2011-01-19 7:11 ` Wolfgang Denk [this message]
2011-01-19 8:18 ` Stefan /*St0fF*/ Hübner
2011-01-19 8:29 ` Jaap Crezee
2011-01-19 9:32 ` Jan Kasprzak
2011-01-19 7:10 ` Wolfgang Denk
2011-01-19 19:21 ` Wolfgang Denk
2011-01-19 19:50 ` Roberto Spadim
2011-01-19 22:36 ` Stefan /*St0fF*/ Hübner
2011-01-19 23:09 ` Roberto Spadim
2011-01-19 23:18 ` Roberto Spadim
2011-01-20 2:48 ` Keld Jørn Simonsen
2011-01-20 3:53 ` Roberto Spadim
2011-01-21 19:34 ` Wolfgang Denk
2011-01-21 20:03 ` Roberto Spadim
2011-01-21 20:04 ` Roberto Spadim
2011-01-24 14:40 ` CoolCold
2011-01-24 15:25 ` Justin Piszcz
2011-01-24 15:25 ` Justin Piszcz
2011-01-24 20:48 ` Wolfgang Denk
2011-01-24 20:48 ` Wolfgang Denk
2011-01-24 21:57 ` Wolfgang Denk
2011-01-24 21:57 ` Wolfgang Denk
2011-01-24 23:03 ` Dave Chinner
2011-01-24 23:03 ` Dave Chinner
2011-01-25 7:39 ` Emmanuel Florac
2011-01-25 7:39 ` Emmanuel Florac
2011-01-25 8:36 ` Dave Chinner
2011-01-25 8:36 ` Dave Chinner
2011-01-25 12:45 ` Wolfgang Denk
2011-01-25 12:45 ` Wolfgang Denk
2011-01-25 12:51 ` Emmanuel Florac
2011-01-25 12:51 ` Emmanuel Florac
2011-01-24 20:43 ` Wolfgang Denk
2011-01-25 17:10 ` Christoph Hellwig
2011-01-25 18:41 ` Wolfgang Denk
2011-01-25 21:35 ` Christoph Hellwig
2011-01-26 7:16 ` Wolfgang Denk
2011-01-26 8:32 ` Stan Hoeppner
2011-01-26 8:42 ` Wolfgang Denk
2011-01-26 9:38 ` Christoph Hellwig
2011-01-26 9:41 ` CoolCold
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