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
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=4D4AC231.8010900@anonymous.org.uk \
--to=john.robinson@anonymous.org.uk \
--cc=linux-raid@vger.kernel.org \
--cc=roberto@spadim.com.br \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for NNTP newsgroup(s).