From: Michal Soltys <soltys@ziu.info>
To: Ben Martin <monkeyiq@users.sourceforge.net>
Cc: linux-raid@vger.kernel.org
Subject: Re: Benchmarks: Linux Kernel RAID vs a Hardware RAID setup
Date: Tue, 15 Jul 2008 17:46:40 +0200 [thread overview]
Message-ID: <487CC660.9030004@ziu.info> (raw)
In-Reply-To: <1216130769.5633.318.camel@sam.localdomain>
Ben Martin wrote:
> Hi,
> Apologies if posting this here is inappropriate but a recent article
> of mine compares the Linux Kernel RAID code to an $800 hardware RAID
> card and might be of interest to list members:
>
> http://www.linux.com/feature/140734
>
Very interesting. Btw - did you use stripe-width on ext3s as well, or
only stride ?
Also looking back at other benchmarks, stripe_cache_size can have pretty
tremendous effect on md raid performance. There're other settings that
could matter as well (read ahead, queue depths). It would be interesting
to see e.g. raid5 256k chunk comparison, done with those altered (
_especially_ md's stripe_cache_size with some high value like 16384 or
32768), and with stripe-width used in ext3 case (if it wasn't used already).
next prev parent reply other threads:[~2008-07-15 15:46 UTC|newest]
Thread overview: 42+ messages / expand[flat|nested] mbox.gz Atom feed top
2008-07-15 14:06 Benchmarks: Linux Kernel RAID vs a Hardware RAID setup Ben Martin
2008-07-15 14:42 ` Justin Piszcz
2008-07-16 4:14 ` Ben Martin
2008-07-15 15:46 ` Michal Soltys [this message]
2008-07-15 20:34 ` Richard Scobie
2008-07-16 2:34 ` Mr. James W. Laferriere
2008-07-16 2:48 ` Richard Scobie
2008-07-16 2:52 ` Mr. James W. Laferriere
2008-07-16 4:17 ` Keld Jørn Simonsen
2008-07-16 5:50 ` Michal Soltys
2008-07-16 3:36 ` Ben Martin
2008-07-16 3:55 ` Richard Scobie
2008-07-16 7:00 ` Dan Williams
2008-07-16 17:08 ` thomas62186218
2008-07-16 19:34 ` Richard Scobie
2008-07-15 16:39 ` Keld Jørn Simonsen
2008-07-15 16:50 ` thomas62186218
2008-07-15 17:39 ` Keld Jørn Simonsen
2008-07-16 0:01 ` Richard Scobie
2008-07-16 0:20 ` Jon Nelson
2008-07-16 4:06 ` Ben Martin
2008-07-16 15:42 ` Ben Martin
2008-07-16 4:23 ` Keld Jørn Simonsen
2008-07-16 5:18 ` Richard Scobie
2008-07-16 8:17 ` Keld Jørn Simonsen
2008-07-15 17:06 ` Jon Nelson
2008-07-16 3:44 ` Ben Martin
2008-07-15 18:40 ` Brad Campbell
2008-07-15 20:12 ` Keld Jørn Simonsen
2008-07-21 16:55 ` Bill Davidsen
2008-07-23 7:45 ` Keld Jørn Simonsen
2008-07-23 10:29 ` Brad Campbell
[not found] ` <487CF499.6080105@harddata.com>
2008-07-15 20:15 ` Keld Jørn Simonsen
2008-07-16 3:58 ` Ben Martin
2008-07-16 4:47 ` Keld Jørn Simonsen
2008-07-21 16:58 ` Bill Davidsen
2008-07-15 19:41 ` Keld Jørn Simonsen
2008-07-16 3:25 ` Ben Martin
2008-07-15 20:40 ` Peter Grandi
2008-07-16 3:38 ` Eric Sandeen
2008-07-16 18:54 ` Alan D. Brunelle
2008-07-17 8:26 ` Ben Martin
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