From: John Robinson <john.robinson@anonymous.org.uk>
To: Roberto Spadim <roberto@spadim.com.br>
Cc: Linux-RAID <linux-raid@vger.kernel.org>
Subject: Re: raid1 - optimization
Date: Thu, 03 Feb 2011 14:56:49 +0000 [thread overview]
Message-ID: <4D4AC231.8010900@anonymous.org.uk> (raw)
In-Reply-To: <AANLkTiknvYgckFSjgr3tE0CSLzAbH62O3x4a5Jn1dg6n@mail.gmail.com>
On 03/02/2011 14:37, Roberto Spadim wrote:
> hi guys, i another thread i read about SNIA DDF Technical Position v2.0
> could we implement RAID-1E, for sequencial/random read speedup?
> http://www.snia.org/tech_activities/standards/curr_standards/ddf/SNIA_DDF_Technical_Position_v2.0.pdf
> after that, could we implement some tweaks on read balance (there's
> another thread just for it)
Those RAID-1E layouts look to me like what's implemented in md RAID as
RAID-10 with near and offset layouts.
As discussed frequently here, md RAID-10 also has a far layout which can
provide slightly faster than RAID-0 throughput for sequential reading
with slightly slower than RAID-1 throughput for sequential writing.
Please see some of the benchmarks that have also been referred to on
this list in the last couple of days.
Cheers,
John.
next prev parent reply other threads:[~2011-02-03 14:56 UTC|newest]
Thread overview: 4+ messages / expand[flat|nested] mbox.gz Atom feed top
2011-02-03 14:37 raid1 - optimization Roberto Spadim
2011-02-03 14:56 ` John Robinson [this message]
2011-02-03 15:20 ` Roberto Spadim
2011-02-03 15:45 ` Keld Jørn Simonsen
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