From: John Robinson <john.robinson@anonymous.org.uk>
To: Stan Hoeppner <stan@hardwarefreak.com>
Cc: Linux RAID <linux-raid@vger.kernel.org>
Subject: Re: New raid level suggestion.
Date: Thu, 30 Dec 2010 11:58:12 +0000 [thread overview]
Message-ID: <4D1C73D4.6050600@anonymous.org.uk> (raw)
In-Reply-To: <4D1C616D.8030904@hardwarefreak.com>
On 30/12/2010 10:39, Stan Hoeppner wrote:
[...]
> Any RAID scheme that uses parity is less than optimal, and up to
> horrible, for heavy random IO loads. As always, this depends on "how
> heavy" the load is. For up to a few hundred constant IOPS you can get
> away with parity RAID schemes. If you need a few thousand or many
> thousand IOPS, better stay away from parity RAID.
Sorry, I have to disagree with this, in this situation. RAID-6 over 4
discs will be just as fast for reading multiple small files as RAID-10
over 4 discs, and a web server is a read-mostly environment, while at
the same time I can't imagine any RAID schema ever giving thousands of
IOPS over 4 discs, parity or no.
Cheers,
John.
next prev parent reply other threads:[~2010-12-30 11:58 UTC|newest]
Thread overview: 16+ messages / expand[flat|nested] mbox.gz Atom feed top
2010-12-30 8:23 New raid level suggestion Rogier Wolff
2010-12-30 8:47 ` Steven Haigh
2010-12-30 9:42 ` Rogier Wolff
2010-12-30 10:39 ` Stan Hoeppner
2010-12-30 11:58 ` John Robinson [this message]
2010-12-30 13:11 ` Stan Hoeppner
2010-12-30 18:10 ` John Robinson
2010-12-31 10:23 ` Stan Hoeppner
2010-12-30 23:20 ` Why won't mdadm start several RAIDs that appear to be fine? Jim Schatzman
2010-12-31 1:08 ` Neil Brown
2010-12-31 3:38 ` Why won't mdadm start several RAIDs that appear to be fine? Info from "mdadm -A --verbose" Jim Schatzman
2010-12-31 3:51 ` Why won't mdadm start several RAIDs that appear to be fine? SOLVED! Jim Schatzman
2011-01-03 4:33 ` New raid level suggestion Leslie Rhorer
2011-01-04 15:29 ` Rogier Wolff
2010-12-30 10:01 ` Neil Brown
2010-12-30 14:24 ` Ryan Wagoner
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