From: Maurice Hilarius <maurice@harddata.com>
To: tfjellstrom@shaw.ca
Cc: linux-raid@vger.kernel.org
Subject: Re: Awful RAID5 random read performance
Date: Mon, 01 Jun 2009 06:43:28 -0600 [thread overview]
Message-ID: <4A23CCF0.7030104@harddata.com> (raw)
In-Reply-To: <200905312339.12234.tfjellstrom@shaw.ca>
Thomas Fjellstrom wrote:
> ..
> Yet I've heard NCQ makes some things worse. Some raid tweaking pages tell you
> to try disabling NCQ.
>
Not so relevant here.
This recommendation to disable drive NCQ is generally due tot he fact
that NCQ implementations by various manufacturers tend
to differ in behaviour, and, in some cases , is just plain "broken".
--
Regards, Maurice
next prev parent reply other threads:[~2009-06-01 12:43 UTC|newest]
Thread overview: 27+ messages / expand[flat|nested] mbox.gz Atom feed top
2009-05-30 21:46 Awful RAID5 random read performance Maurice Hilarius
2009-05-31 6:25 ` Michael Tokarev
2009-05-31 7:47 ` Thomas Fjellstrom
2009-05-31 12:29 ` John Robinson
2009-05-31 15:41 ` Leslie Rhorer
2009-05-31 16:56 ` Thomas Fjellstrom
2009-05-31 18:26 ` Keld Jørn Simonsen
2009-06-02 18:54 ` Bill Davidsen
2009-06-02 19:47 ` Keld Jørn Simonsen
2009-06-02 23:13 ` John Robinson
2009-06-03 18:38 ` Bill Davidsen
2009-06-03 19:57 ` John Robinson
2009-06-03 22:21 ` Goswin von Brederlow
2009-06-04 11:23 ` Keld Jørn Simonsen
2009-06-04 22:40 ` Nifty Fedora Mitch
2009-06-06 23:06 ` Bill Davidsen
2009-06-01 1:19 ` Carlos Carvalho
2009-06-01 4:57 ` Leslie Rhorer
2009-06-01 5:39 ` Thomas Fjellstrom
2009-06-01 12:43 ` Maurice Hilarius [this message]
2009-06-02 14:57 ` Wil Reichert
2009-06-02 15:14 ` Maurice Hilarius
2009-06-02 19:47 ` Bill Davidsen
2009-06-01 11:41 ` Goswin von Brederlow
2009-06-03 1:57 ` Leslie Rhorer
2009-05-31 17:19 ` Goswin von Brederlow
2009-06-01 12:01 ` John Robinson
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