From: "Keld Jørn Simonsen" <keld@dkuug.dk>
To: Justin Piszcz <jpiszcz@lucidpixels.com>
Cc: Janek Kozicki <janek_listy@wp.pl>, linux-raid@vger.kernel.org
Subject: Re: which raid level gives maximum overall speed? (raid-10,f2 vs. raid-0)
Date: Tue, 5 Feb 2008 23:55:34 +0100 [thread overview]
Message-ID: <20080205225534.GA32053@rap.rap.dk> (raw)
In-Reply-To: <alpine.DEB.1.00.0802051726510.10352@p34.internal.lan>
On Tue, Feb 05, 2008 at 05:28:27PM -0500, Justin Piszcz wrote:
>
>
> >Could you give some figures?
>
> I remember testing with bonnie++ and raid10 was about half the speed
> (200-265 MiB/s) as RAID5 (400-420 MiB/s) for sequential output, but input
> was closer to RAID5 speeds/did not seem affected (~550MiB/s).
Impressive. What levet of raid10 was involved? and what type of
equipment, how many disks? Maybe the better output for raid5 could be
due to some striping - AFAIK raid5 will be striping quite well, and
writes almost equal to reading time indicates that the writes are
striping too.
best regards
keld
next prev parent reply other threads:[~2008-02-05 22:55 UTC|newest]
Thread overview: 15+ messages / expand[flat|nested] mbox.gz Atom feed top
2008-01-30 18:21 which raid level gives maximum overall speed? (raid-10,f2 vs. raid-0) Janek Kozicki
2008-01-30 22:00 ` Keld Jørn Simonsen
2008-01-30 22:36 ` Janek Kozicki
2008-01-31 1:55 ` Keld Jørn Simonsen
2008-01-31 14:01 ` Janek Kozicki
2008-02-05 16:10 ` Keld Jørn Simonsen
2008-02-05 16:54 ` Justin Piszcz
2008-02-05 20:04 ` Keld Jørn Simonsen
2008-02-05 22:28 ` Justin Piszcz
2008-02-05 22:52 ` Janek Kozicki
2008-02-06 9:06 ` Peter Rabbitson
[not found] ` <47A9F96E.7050307@tmr.com>
2008-02-06 22:15 ` Janek Kozicki
2008-02-05 22:55 ` Keld Jørn Simonsen [this message]
2008-02-05 22:58 ` Justin Piszcz
2008-01-31 15:30 ` Bill Davidsen
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