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Date:      Sat, 06 Nov 2010 15:00:07 -0400
From:      "Mikhail T." <mi+thunw@aldan.algebra.com>
To:        Julian Elischer <julian@freebsd.org>
Cc:        fs@freebsd.org
Subject:   Re: iozone-ing an SSD (Re: Using an SSD "disk" for /)
Message-ID:  <4CD5A5B7.4040006@aldan.algebra.com>
In-Reply-To: <4CD48F81.1080201@aldan.algebra.com>
References:  <4CD04AEC.8040607@aldan.algebra.com> <4CD051A9.7090200@freebsd.org> <4CD0660E.2000102@aldan.algebra.com> <4CD06C4B.80100@freebsd.org> <4CD0895A.5030402@aldan.algebra.com> <4CD09830.3030400@freebsd.org> <4CD48F81.1080201@aldan.algebra.com>

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On 11/5/2010 7:13 PM, Mikhail T. wrote:
> The results can be found in 4 HTML files found at:
> http://aldan.algebra.com/~mi/io/ (The original iozone-created Excel
> files are there too.)
I added some more iozone runs, as well as those of rawio. These are much
fewer (as file-system parameters don't affect rawio) and easier to
interpret:

    * It makes no difference to the SSD, whether your access is random
      or sequential
    * SSD clearly beats the HD in rawrite, although, at "only" 88Mb/sec,
      the results are far from the marketing...
    * SSD connected to plain SATA port strongly beats the same SSD
      connected to the fancy SAS controller (mpt)

Yours,

    -mi




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