From mboxrd@z Thu Jan  1 00:00:00 1970
From: NeilBrown <neilb@suse.de>
Subject: Re: md RAID with enterprise-class SATA or SAS drives
Date: Thu, 24 May 2012 12:08:19 +1000
Message-ID: <20120524120819.08ffa3b0@notabene.brown>
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Cc: David Brown <david.brown@hesbynett.no>, CoolCold <coolthecold@gmail.com>, Daniel Pocock <daniel@pocock.com.au>, Roberto Spadim <roberto@spadim.com.br>, Phil Turmel <philip@turmel.org>, Marcus Sorensen <shadowsor@gmail.com>, linux-raid@vger.kernel.org
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On Wed, 23 May 2012 20:18:06 -0500 Stan Hoeppner <stan@hardwarefreak.com>
wrote:

> On 5/23/2012 6:46 PM, Stan Hoeppner wrote:
> > On 5/23/2012 2:49 PM, David Brown wrote:
> >=20
> >> It looks like Shaohua Li has done some testing, found that there is a
> >> slow-down even with just 2 or 4 disks, and has written patches to fix =
it
> >> (for raid1 and raid10 so far), which is very nice.
> >=20
> > Ahh, thanks David.  I wasn't aware of Shaohua Li's
> > work on this.  Got a link to his documentation and patches, or article,
> > by chance?
>=20
> My Google searches only turn up Shaohua Li's TRIM patches.  I don't
> believe the issue we're discussing has anything to do with TRIM, though
> I can't be 100% sure as Mark didn't provide much detail of his thread
> ceiling problem, and I don't have a suitable system to do proper testing.
>=20
> Again it would be nice to have a link to Shaohua Li's work to which you
> refer to determine if it's applicable to this issue.
>=20

It's probably in your INBOX.

http://www.spinics.net/lists/raid/msg38899.html

NeilBrown

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