From: Stan Hoeppner <stan@hardwarefreak.com>
To: Dave Chinner <david@fromorbit.com>
Cc: NeilBrown <neilb@suse.de>, David Brown <david.brown@hesbynett.no>,
Michael Tokarev <mjt@tls.msk.ru>,
Miquel van Smoorenburg <mikevs@xs4all.net>,
Linux RAID <linux-raid@vger.kernel.org>,
LKML@dastard.hardwarefreak.com
Subject: Re: O_DIRECT to md raid 6 is slow
Date: Mon, 20 Aug 2012 00:42:05 -0500 [thread overview]
Message-ID: <5031CE2D.8030600@hardwarefreak.com> (raw)
In-Reply-To: <20120820051951.GC19235@dastard>
On 8/20/2012 12:19 AM, Dave Chinner wrote:
> Oh, you're probably complaining about that write number.
I wasn't complaining. You know me better than that.
The cops caught me robbing a bank. Under pressure, I pointed at you and
said "He gave me the gun and ammo!". ;) Of course it was completely my
responsibility for shooting myself in the foot with it. :)
> Either way, the point I was making in the original post stands -
> RAID6 sucks balls for most workloads as they only do small writes in
> comparison to the stripe width of the volume....
Agreed. Which was the point I originally made in this thread. "We"
simply got a minor detail wrong. It seems folks on the linux-raid list
like to split every hair 2^6 times, with extremely valid points getting
lost when the discussion drops into the weeds.
Sorry I dragged you into this Dave.
--
Stan
next prev parent reply other threads:[~2012-08-20 5:42 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
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 [this message]
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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