From: John Robinson <john.robinson@anonymous.org.uk>
To: Andy Lutomirski <luto@amacapital.net>
Cc: linux-kernel@vger.kernel.org, linux-raid@vger.kernel.org
Subject: Re: O_DIRECT to md raid 6 is slow
Date: Wed, 15 Aug 2012 12:50:55 +0100 [thread overview]
Message-ID: <502B8D1F.7030706@anonymous.org.uk> (raw)
In-Reply-To: <CALCETrWCu=UPATPdqWP=Gpvswv-RDwaxfr1W1jxYtUMZsqKgSQ@mail.gmail.com>
On 15/08/2012 01:49, Andy Lutomirski wrote:
> If I do:
> # dd if=/dev/zero of=/dev/md0p1 bs=8M
[...]
> It looks like md isn't recognizing that I'm writing whole stripes when
> I'm in O_DIRECT mode.
I see your md device is partitioned. Is the partition itself stripe-aligned?
Cheers,
John.
next prev parent reply other threads:[~2012-08-15 11:50 UTC|newest]
Thread overview: 31+ messages / expand[flat|nested] mbox.gz Atom feed top
2012-08-15 0:49 O_DIRECT to md raid 6 is slow Andy Lutomirski
2012-08-15 1:07 ` kedacomkernel
2012-08-15 1:07 ` kedacomkernel
2012-08-15 1:12 ` Andy Lutomirski
2012-08-15 1:23 ` kedacomkernel
2012-08-15 1:23 ` kedacomkernel
2012-08-15 11:50 ` John Robinson [this message]
2012-08-15 17:57 ` Andy Lutomirski
2012-08-15 22:00 ` Stan Hoeppner
2012-08-15 22:10 ` Andy Lutomirski
2012-08-15 23:50 ` Stan Hoeppner
2012-08-16 1:08 ` Andy Lutomirski
2012-08-16 6:41 ` Roman Mamedov
2012-08-15 23:07 ` Miquel van Smoorenburg
2012-08-16 11:05 ` Stan Hoeppner
2012-08-16 21:50 ` Miquel van Smoorenburg
2012-08-17 7:31 ` Stan Hoeppner
2012-08-17 11:16 ` Miquel van Smoorenburg
2012-08-18 5:09 ` Stan Hoeppner
2012-08-18 10:08 ` Michael Tokarev
2012-08-19 3:17 ` Stan Hoeppner
2012-08-19 14:01 ` David Brown
2012-08-19 23:34 ` Stan Hoeppner
2012-08-20 0:01 ` NeilBrown
2012-08-20 4:44 ` Stan Hoeppner
2012-08-20 5:19 ` Dave Chinner
2012-08-20 5:42 ` Stan Hoeppner
2012-08-20 7:47 ` David Brown
2012-08-21 14:51 ` Miquel van Smoorenburg
2012-08-22 3:59 ` Stan Hoeppner
2012-08-19 17:02 ` Chris Murphy
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